Home / 811,812.31-1,217,693.35-385,654.91

Finding the Fourth Proportional to 811,812.31, 1,217,693.35 and 385,654.91

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Solution

The fourth proportional to 811,812.31, 1,217,693.35 and 385,654.91 is: 578,470.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,812.31 : 1,217,693.35 = 385,654.91 : x
  2. Step 2: Convert to fraction form
    811,812.31/1,217,693.35 = 385,654.91/x
  3. Step 3: Cross multiply
    811,812.31x = 1,217,693.35 × 385,654.91
  4. Step 4: Simplify right side
    811,812.31x = 469,609,419,301.85
  5. Step 5: Solve for x
    x = 469,609,419,301.85/811,812.31
  6. Step 6: Final answer
    x = 578,470.43

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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.