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Finding the Fourth Proportional to 418,020.40, 626,641.80 and 291,660.40

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Solution

The fourth proportional to 418,020.40, 626,641.80 and 291,660.40 is: 437,219.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,020.40 : 626,641.80 = 291,660.40 : x
  2. Step 2: Convert to fraction form
    418,020.40/626,641.80 = 291,660.40/x
  3. Step 3: Cross multiply
    418,020.40x = 626,641.80 × 291,660.40
  4. Step 4: Simplify right side
    418,020.40x = 182,766,598,044.72
  5. Step 5: Solve for x
    x = 182,766,598,044.72/418,020.40
  6. Step 6: Final answer
    x = 437,219.33

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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.