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Finding the Fourth Proportional to 660,292.40, 987,814.20 and 572,520.80

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Solution

The fourth proportional to 660,292.40, 987,814.20 and 572,520.80 is: 856,505.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,292.40 : 987,814.20 = 572,520.80 : x
  2. Step 2: Convert to fraction form
    660,292.40/987,814.20 = 572,520.80/x
  3. Step 3: Cross multiply
    660,292.40x = 987,814.20 × 572,520.80
  4. Step 4: Simplify right side
    660,292.40x = 565,544,176,035.36
  5. Step 5: Solve for x
    x = 565,544,176,035.36/660,292.40
  6. Step 6: Final answer
    x = 856,505.66

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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.