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Finding the Fourth Proportional to 859,700.80, 1,289,551.20 and 660,404.80

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Solution

The fourth proportional to 859,700.80, 1,289,551.20 and 660,404.80 is: 990,607.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,700.80 : 1,289,551.20 = 660,404.80 : x
  2. Step 2: Convert to fraction form
    859,700.80/1,289,551.20 = 660,404.80/x
  3. Step 3: Cross multiply
    859,700.80x = 1,289,551.20 × 660,404.80
  4. Step 4: Simplify right side
    859,700.80x = 851,625,802,325.76
  5. Step 5: Solve for x
    x = 851,625,802,325.76/859,700.80
  6. Step 6: Final answer
    x = 990,607.20

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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.