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Finding the Fourth Proportional to 660,287.40, 987,806.70 and 572,515.80

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Solution

The fourth proportional to 660,287.40, 987,806.70 and 572,515.80 is: 856,498.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,287.40 : 987,806.70 = 572,515.80 : x
  2. Step 2: Convert to fraction form
    660,287.40/987,806.70 = 572,515.80/x
  3. Step 3: Cross multiply
    660,287.40x = 987,806.70 × 572,515.80
  4. Step 4: Simplify right side
    660,287.40x = 565,534,943,095.86
  5. Step 5: Solve for x
    x = 565,534,943,095.86/660,287.40
  6. Step 6: Final answer
    x = 856,498.16

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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.