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Finding the Fourth Proportional to 885.90, 1,330.89 and 557.85

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Solution

The fourth proportional to 885.90, 1,330.89 and 557.85 is: 838.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.90 : 1,330.89 = 557.85 : x
  2. Step 2: Convert to fraction form
    885.90/1,330.89 = 557.85/x
  3. Step 3: Cross multiply
    885.90x = 1,330.89 × 557.85
  4. Step 4: Simplify right side
    885.90x = 742,436.99
  5. Step 5: Solve for x
    x = 742,436.99/885.90
  6. Step 6: Final answer
    x = 838.06

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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.