Home / 739,687.70-1,109,531.55-420,823.10

Finding the Fourth Proportional to 739,687.70, 1,109,531.55 and 420,823.10

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Solution

The fourth proportional to 739,687.70, 1,109,531.55 and 420,823.10 is: 631,234.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    739,687.70 : 1,109,531.55 = 420,823.10 : x
  2. Step 2: Convert to fraction form
    739,687.70/1,109,531.55 = 420,823.10/x
  3. Step 3: Cross multiply
    739,687.70x = 1,109,531.55 × 420,823.10
  4. Step 4: Simplify right side
    739,687.70x = 466,916,506,418.81
  5. Step 5: Solve for x
    x = 466,916,506,418.81/739,687.70
  6. Step 6: Final answer
    x = 631,234.65

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1.5x scale

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.