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Finding the Fourth Proportional to 1,152.90, 1,729.89 and 503.55

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Solution

The fourth proportional to 1,152.90, 1,729.89 and 503.55 is: 755.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,152.90 : 1,729.89 = 503.55 : x
  2. Step 2: Convert to fraction form
    1,152.90/1,729.89 = 503.55/x
  3. Step 3: Cross multiply
    1,152.90x = 1,729.89 × 503.55
  4. Step 4: Simplify right side
    1,152.90x = 871,086.11
  5. Step 5: Solve for x
    x = 871,086.11/1,152.90
  6. Step 6: Final answer
    x = 755.56

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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.