Home / 1,112,538.60-1,668,807.90-687,385.80

Finding the Fourth Proportional to 1,112,538.60, 1,668,807.90 and 687,385.80

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Solution

The fourth proportional to 1,112,538.60, 1,668,807.90 and 687,385.80 is: 1,031,078.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,112,538.60 : 1,668,807.90 = 687,385.80 : x
  2. Step 2: Convert to fraction form
    1,112,538.60/1,668,807.90 = 687,385.80/x
  3. Step 3: Cross multiply
    1,112,538.60x = 1,668,807.90 × 687,385.80
  4. Step 4: Simplify right side
    1,112,538.60x = 1,147,114,853,387.82
  5. Step 5: Solve for x
    x = 1,147,114,853,387.82/1,112,538.60
  6. Step 6: Final answer
    x = 1,031,078.70

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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.