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Finding the Fourth Proportional to 660,286.40, 987,805.20 and 572,514.80

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Solution

The fourth proportional to 660,286.40, 987,805.20 and 572,514.80 is: 856,496.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,286.40 : 987,805.20 = 572,514.80 : x
  2. Step 2: Convert to fraction form
    660,286.40/987,805.20 = 572,514.80/x
  3. Step 3: Cross multiply
    660,286.40x = 987,805.20 × 572,514.80
  4. Step 4: Simplify right side
    660,286.40x = 565,533,096,516.96
  5. Step 5: Solve for x
    x = 565,533,096,516.96/660,286.40
  6. Step 6: Final answer
    x = 856,496.66

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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.