Home / 1,557.96-2,149.70-928.40

Finding the Fourth Proportional to 1,557.96, 2,149.70 and 928.40

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Solution

The fourth proportional to 1,557.96, 2,149.70 and 928.40 is: 1,281.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,557.96 : 2,149.70 = 928.40 : x
  2. Step 2: Convert to fraction form
    1,557.96/2,149.70 = 928.40/x
  3. Step 3: Cross multiply
    1,557.96x = 2,149.70 × 928.40
  4. Step 4: Simplify right side
    1,557.96x = 1,995,781.48
  5. Step 5: Solve for x
    x = 1,995,781.48/1,557.96
  6. Step 6: Final answer
    x = 1,281.02

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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.