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Finding the Fourth Proportional to 713,397.67, 984,488.54 and 391,100.84

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Solution

The fourth proportional to 713,397.67, 984,488.54 and 391,100.84 is: 539,719.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,397.67 : 984,488.54 = 391,100.84 : x
  2. Step 2: Convert to fraction form
    713,397.67/984,488.54 = 391,100.84/x
  3. Step 3: Cross multiply
    713,397.67x = 984,488.54 × 391,100.84
  4. Step 4: Simplify right side
    713,397.67x = 385,034,294,964.37
  5. Step 5: Solve for x
    x = 385,034,294,964.37/713,397.67
  6. Step 6: Final answer
    x = 539,719.03

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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.