Home / 858,187.38-1,287,307.60-431,740.56

Finding the Fourth Proportional to 858,187.38, 1,287,307.60 and 431,740.56

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Solution

The fourth proportional to 858,187.38, 1,287,307.60 and 431,740.56 is: 647,624.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,187.38 : 1,287,307.60 = 431,740.56 : x
  2. Step 2: Convert to fraction form
    858,187.38/1,287,307.60 = 431,740.56/x
  3. Step 3: Cross multiply
    858,187.38x = 1,287,307.60 × 431,740.56
  4. Step 4: Simplify right side
    858,187.38x = 555,782,901,957.55
  5. Step 5: Solve for x
    x = 555,782,901,957.55/858,187.38
  6. Step 6: Final answer
    x = 647,624.18

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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.