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Finding the Fourth Proportional to 418,877.40, 628,316.10 and 250,915.80

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Solution

The fourth proportional to 418,877.40, 628,316.10 and 250,915.80 is: 376,373.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,877.40 : 628,316.10 = 250,915.80 : x
  2. Step 2: Convert to fraction form
    418,877.40/628,316.10 = 250,915.80/x
  3. Step 3: Cross multiply
    418,877.40x = 628,316.10 × 250,915.80
  4. Step 4: Simplify right side
    418,877.40x = 157,654,436,884.38
  5. Step 5: Solve for x
    x = 157,654,436,884.38/418,877.40
  6. Step 6: Final answer
    x = 376,373.70

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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.