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Finding the Fourth Proportional to 719,306.50, 992,642.97 and 401,354.50

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Solution

The fourth proportional to 719,306.50, 992,642.97 and 401,354.50 is: 553,869.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,306.50 : 992,642.97 = 401,354.50 : x
  2. Step 2: Convert to fraction form
    719,306.50/992,642.97 = 401,354.50/x
  3. Step 3: Cross multiply
    719,306.50x = 992,642.97 × 401,354.50
  4. Step 4: Simplify right side
    719,306.50x = 398,401,722,902.87
  5. Step 5: Solve for x
    x = 398,401,722,902.87/719,306.50
  6. Step 6: Final answer
    x = 553,869.21

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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.