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Finding the Fourth Proportional to 720.29, 1,079.54 and 373.42

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Solution

The fourth proportional to 720.29, 1,079.54 and 373.42 is: 559.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.29 : 1,079.54 = 373.42 : x
  2. Step 2: Convert to fraction form
    720.29/1,079.54 = 373.42/x
  3. Step 3: Cross multiply
    720.29x = 1,079.54 × 373.42
  4. Step 4: Simplify right side
    720.29x = 403,124.11
  5. Step 5: Solve for x
    x = 403,124.11/720.29
  6. Step 6: Final answer
    x = 559.67

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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.