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Finding the Fourth Proportional to 658,428.80, 908,705.49 and 371,967.35

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Solution

The fourth proportional to 658,428.80, 908,705.49 and 371,967.35 is: 513,356.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,428.80 : 908,705.49 = 371,967.35 : x
  2. Step 2: Convert to fraction form
    658,428.80/908,705.49 = 371,967.35/x
  3. Step 3: Cross multiply
    658,428.80x = 908,705.49 × 371,967.35
  4. Step 4: Simplify right side
    658,428.80x = 338,008,773,045.75
  5. Step 5: Solve for x
    x = 338,008,773,045.75/658,428.80
  6. Step 6: Final answer
    x = 513,356.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.