Home / 1,557.39-2,149.12-928.63

Finding the Fourth Proportional to 1,557.39, 2,149.12 and 928.63

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Solution

The fourth proportional to 1,557.39, 2,149.12 and 928.63 is: 1,281.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,557.39 : 2,149.12 = 928.63 : x
  2. Step 2: Convert to fraction form
    1,557.39/2,149.12 = 928.63/x
  3. Step 3: Cross multiply
    1,557.39x = 2,149.12 × 928.63
  4. Step 4: Simplify right side
    1,557.39x = 1,995,737.31
  5. Step 5: Solve for x
    x = 1,995,737.31/1,557.39
  6. Step 6: Final answer
    x = 1,281.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.