Home / 1,287.95-1,932.21-557.64

Finding the Fourth Proportional to 1,287.95, 1,932.21 and 557.64

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Solution

The fourth proportional to 1,287.95, 1,932.21 and 557.64 is: 836.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287.95 : 1,932.21 = 557.64 : x
  2. Step 2: Convert to fraction form
    1,287.95/1,932.21 = 557.64/x
  3. Step 3: Cross multiply
    1,287.95x = 1,932.21 × 557.64
  4. Step 4: Simplify right side
    1,287.95x = 1,077,477.58
  5. Step 5: Solve for x
    x = 1,077,477.58/1,287.95
  6. Step 6: Final answer
    x = 836.59

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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.