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Finding the Fourth Proportional to 1,425.96, 2,139.12 and 501.30

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Solution

The fourth proportional to 1,425.96, 2,139.12 and 501.30 is: 752.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425.96 : 2,139.12 = 501.30 : x
  2. Step 2: Convert to fraction form
    1,425.96/2,139.12 = 501.30/x
  3. Step 3: Cross multiply
    1,425.96x = 2,139.12 × 501.30
  4. Step 4: Simplify right side
    1,425.96x = 1,072,340.86
  5. Step 5: Solve for x
    x = 1,072,340.86/1,425.96
  6. Step 6: Final answer
    x = 752.01

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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.