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Finding the Fourth Proportional to 763.48, 1,145.18 and 373.42

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Solution

The fourth proportional to 763.48, 1,145.18 and 373.42 is: 560.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    763.48 : 1,145.18 = 373.42 : x
  2. Step 2: Convert to fraction form
    763.48/1,145.18 = 373.42/x
  3. Step 3: Cross multiply
    763.48x = 1,145.18 × 373.42
  4. Step 4: Simplify right side
    763.48x = 427,633.12
  5. Step 5: Solve for x
    x = 427,633.12/763.48
  6. Step 6: Final answer
    x = 560.11

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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.