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Finding the Fourth Proportional to 657,808.40, 986,712.60 and 478,474.40

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Solution

The fourth proportional to 657,808.40, 986,712.60 and 478,474.40 is: 717,711.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,808.40 : 986,712.60 = 478,474.40 : x
  2. Step 2: Convert to fraction form
    657,808.40/986,712.60 = 478,474.40/x
  3. Step 3: Cross multiply
    657,808.40x = 986,712.60 × 478,474.40
  4. Step 4: Simplify right side
    657,808.40x = 472,116,719,257.44
  5. Step 5: Solve for x
    x = 472,116,719,257.44/657,808.40
  6. Step 6: Final answer
    x = 717,711.60

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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.