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Finding the Fourth Proportional to 631,291.60, 946,937.40 and 418,715.20

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Solution

The fourth proportional to 631,291.60, 946,937.40 and 418,715.20 is: 628,072.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,291.60 : 946,937.40 = 418,715.20 : x
  2. Step 2: Convert to fraction form
    631,291.60/946,937.40 = 418,715.20/x
  3. Step 3: Cross multiply
    631,291.60x = 946,937.40 × 418,715.20
  4. Step 4: Simplify right side
    631,291.60x = 396,497,082,828.48
  5. Step 5: Solve for x
    x = 396,497,082,828.48/631,291.60
  6. Step 6: Final answer
    x = 628,072.80

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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.