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Finding the Fourth Proportional to 1,142.59, 1,712.66 and 557.99

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Solution

The fourth proportional to 1,142.59, 1,712.66 and 557.99 is: 836.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,142.59 : 1,712.66 = 557.99 : x
  2. Step 2: Convert to fraction form
    1,142.59/1,712.66 = 557.99/x
  3. Step 3: Cross multiply
    1,142.59x = 1,712.66 × 557.99
  4. Step 4: Simplify right side
    1,142.59x = 955,647.15
  5. Step 5: Solve for x
    x = 955,647.15/1,142.59
  6. Step 6: Final answer
    x = 836.39

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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.