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Finding the Fourth Proportional to 579,803.60, 869,705.40 and 280,427.60

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Solution

The fourth proportional to 579,803.60, 869,705.40 and 280,427.60 is: 420,641.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,803.60 : 869,705.40 = 280,427.60 : x
  2. Step 2: Convert to fraction form
    579,803.60/869,705.40 = 280,427.60/x
  3. Step 3: Cross multiply
    579,803.60x = 869,705.40 × 280,427.60
  4. Step 4: Simplify right side
    579,803.60x = 243,889,398,029.04
  5. Step 5: Solve for x
    x = 243,889,398,029.04/579,803.60
  6. Step 6: Final answer
    x = 420,641.40

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Double scale
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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.