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Finding the Fourth Proportional to 858,562.60, 1,287,843.90 and 659,885.80

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Solution

The fourth proportional to 858,562.60, 1,287,843.90 and 659,885.80 is: 989,828.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,562.60 : 1,287,843.90 = 659,885.80 : x
  2. Step 2: Convert to fraction form
    858,562.60/1,287,843.90 = 659,885.80/x
  3. Step 3: Cross multiply
    858,562.60x = 1,287,843.90 × 659,885.80
  4. Step 4: Simplify right side
    858,562.60x = 849,829,902,226.62
  5. Step 5: Solve for x
    x = 849,829,902,226.62/858,562.60
  6. Step 6: Final answer
    x = 989,828.70

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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.