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Finding the Fourth Proportional to 573,870.70, 861,134.10 and 219,139.30

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Solution

The fourth proportional to 573,870.70, 861,134.10 and 219,139.30 is: 328,834.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    573,870.70 : 861,134.10 = 219,139.30 : x
  2. Step 2: Convert to fraction form
    573,870.70/861,134.10 = 219,139.30/x
  3. Step 3: Cross multiply
    573,870.70x = 861,134.10 × 219,139.30
  4. Step 4: Simplify right side
    573,870.70x = 188,708,323,880.13
  5. Step 5: Solve for x
    x = 188,708,323,880.13/573,870.70
  6. Step 6: Final answer
    x = 328,834.22

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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.