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Finding the Fourth Proportional to 611,711.20, 858,167.15 and 611,711.20

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Solution

The fourth proportional to 611,711.20, 858,167.15 and 611,711.20 is: 858,167.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,711.20 : 858,167.15 = 611,711.20 : x
  2. Step 2: Convert to fraction form
    611,711.20/858,167.15 = 611,711.20/x
  3. Step 3: Cross multiply
    611,711.20x = 858,167.15 × 611,711.20
  4. Step 4: Simplify right side
    611,711.20x = 524,950,457,127.08
  5. Step 5: Solve for x
    x = 524,950,457,127.08/611,711.20
  6. Step 6: Final answer
    x = 858,167.15

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.