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Finding the Fourth Proportional to 547,767.60, 821,651.40 and 398,468.40

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Solution

The fourth proportional to 547,767.60, 821,651.40 and 398,468.40 is: 597,702.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,767.60 : 821,651.40 = 398,468.40 : x
  2. Step 2: Convert to fraction form
    547,767.60/821,651.40 = 398,468.40/x
  3. Step 3: Cross multiply
    547,767.60x = 821,651.40 × 398,468.40
  4. Step 4: Simplify right side
    547,767.60x = 327,402,118,715.76
  5. Step 5: Solve for x
    x = 327,402,118,715.76/547,767.60
  6. Step 6: Final answer
    x = 597,702.60

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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.