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Finding the Fourth Proportional to 1,115.23, 1,672.88 and 529.93

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Solution

The fourth proportional to 1,115.23, 1,672.88 and 529.93 is: 794.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,115.23 : 1,672.88 = 529.93 : x
  2. Step 2: Convert to fraction form
    1,115.23/1,672.88 = 529.93/x
  3. Step 3: Cross multiply
    1,115.23x = 1,672.88 × 529.93
  4. Step 4: Simplify right side
    1,115.23x = 886,509.30
  5. Step 5: Solve for x
    x = 886,509.30/1,115.23
  6. Step 6: Final answer
    x = 794.91

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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.