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Finding the Fourth Proportional to 631,290.80, 946,936.20 and 418,714.40

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Solution

The fourth proportional to 631,290.80, 946,936.20 and 418,714.40 is: 628,071.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,290.80 : 946,936.20 = 418,714.40 : x
  2. Step 2: Convert to fraction form
    631,290.80/946,936.20 = 418,714.40/x
  3. Step 3: Cross multiply
    631,290.80x = 946,936.20 × 418,714.40
  4. Step 4: Simplify right side
    631,290.80x = 396,495,822,821.28
  5. Step 5: Solve for x
    x = 396,495,822,821.28/631,290.80
  6. Step 6: Final answer
    x = 628,071.60

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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.