Home / 1,287.51-1,932.13-557.16

Finding the Fourth Proportional to 1,287.51, 1,932.13 and 557.16

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Solution

The fourth proportional to 1,287.51, 1,932.13 and 557.16 is: 836.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287.51 : 1,932.13 = 557.16 : x
  2. Step 2: Convert to fraction form
    1,287.51/1,932.13 = 557.16/x
  3. Step 3: Cross multiply
    1,287.51x = 1,932.13 × 557.16
  4. Step 4: Simplify right side
    1,287.51x = 1,076,505.55
  5. Step 5: Solve for x
    x = 1,076,505.55/1,287.51
  6. Step 6: Final answer
    x = 836.11

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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.