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Finding the Fourth Proportional to 424,781.40, 637,211.70 and 140,473.08

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Solution

The fourth proportional to 424,781.40, 637,211.70 and 140,473.08 is: 210,722.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,781.40 : 637,211.70 = 140,473.08 : x
  2. Step 2: Convert to fraction form
    424,781.40/637,211.70 = 140,473.08/x
  3. Step 3: Cross multiply
    424,781.40x = 637,211.70 × 140,473.08
  4. Step 4: Simplify right side
    424,781.40x = 89,511,090,111.04
  5. Step 5: Solve for x
    x = 89,511,090,111.04/424,781.40
  6. Step 6: Final answer
    x = 210,722.72

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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.