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Finding the Fourth Proportional to 579,801.60, 869,702.40 and 280,425.60

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Solution

The fourth proportional to 579,801.60, 869,702.40 and 280,425.60 is: 420,638.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,801.60 : 869,702.40 = 280,425.60 : x
  2. Step 2: Convert to fraction form
    579,801.60/869,702.40 = 280,425.60/x
  3. Step 3: Cross multiply
    579,801.60x = 869,702.40 × 280,425.60
  4. Step 4: Simplify right side
    579,801.60x = 243,886,817,341.44
  5. Step 5: Solve for x
    x = 243,886,817,341.44/579,801.60
  6. Step 6: Final answer
    x = 420,638.40

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Half scale
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Double scale
Find fourth proportional to 579,802.60, 869,703.90 and 280,426.60
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.