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Finding the Fourth Proportional to 631,302.80, 946,954.20 and 418,726.40

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Solution

The fourth proportional to 631,302.80, 946,954.20 and 418,726.40 is: 628,089.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,302.80 : 946,954.20 = 418,726.40 : x
  2. Step 2: Convert to fraction form
    631,302.80/946,954.20 = 418,726.40/x
  3. Step 3: Cross multiply
    631,302.80x = 946,954.20 × 418,726.40
  4. Step 4: Simplify right side
    631,302.80x = 396,514,723,130.88
  5. Step 5: Solve for x
    x = 396,514,723,130.88/631,302.80
  6. Step 6: Final answer
    x = 628,089.60

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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.