Home / 687,140.70-1,030,711.05-288,231.90

Finding the Fourth Proportional to 687,140.70, 1,030,711.05 and 288,231.90

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Solution

The fourth proportional to 687,140.70, 1,030,711.05 and 288,231.90 is: 432,347.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,140.70 : 1,030,711.05 = 288,231.90 : x
  2. Step 2: Convert to fraction form
    687,140.70/1,030,711.05 = 288,231.90/x
  3. Step 3: Cross multiply
    687,140.70x = 1,030,711.05 × 288,231.90
  4. Step 4: Simplify right side
    687,140.70x = 297,083,804,292.50
  5. Step 5: Solve for x
    x = 297,083,804,292.50/687,140.70
  6. Step 6: Final answer
    x = 432,347.85

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Similar ratio
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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.