Home / 1,557.12-2,332.92-1,387.63

Finding the Fourth Proportional to 1,557.12, 2,332.92 and 1,387.63

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Solution

The fourth proportional to 1,557.12, 2,332.92 and 1,387.63 is: 2,078.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,557.12 : 2,332.92 = 1,387.63 : x
  2. Step 2: Convert to fraction form
    1,557.12/2,332.92 = 1,387.63/x
  3. Step 3: Cross multiply
    1,557.12x = 2,332.92 × 1,387.63
  4. Step 4: Simplify right side
    1,557.12x = 3,237,229.78
  5. Step 5: Solve for x
    x = 3,237,229.78/1,557.12
  6. Step 6: Final answer
    x = 2,078.99

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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.