Home / 1,288.61-1,932.15-557.79

Finding the Fourth Proportional to 1,288.61, 1,932.15 and 557.79

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Solution

The fourth proportional to 1,288.61, 1,932.15 and 557.79 is: 836.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288.61 : 1,932.15 = 557.79 : x
  2. Step 2: Convert to fraction form
    1,288.61/1,932.15 = 557.79/x
  3. Step 3: Cross multiply
    1,288.61x = 1,932.15 × 557.79
  4. Step 4: Simplify right side
    1,288.61x = 1,077,728.79
  5. Step 5: Solve for x
    x = 1,077,728.79/1,288.61
  6. Step 6: Final answer
    x = 836.35

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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.