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Finding the Fourth Proportional to 2,438.76, 3,658.68 and 707.40

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Solution

The fourth proportional to 2,438.76, 3,658.68 and 707.40 is: 1,061.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,438.76 : 3,658.68 = 707.40 : x
  2. Step 2: Convert to fraction form
    2,438.76/3,658.68 = 707.40/x
  3. Step 3: Cross multiply
    2,438.76x = 3,658.68 × 707.40
  4. Step 4: Simplify right side
    2,438.76x = 2,588,150.23
  5. Step 5: Solve for x
    x = 2,588,150.23/2,438.76
  6. Step 6: Final answer
    x = 1,061.26

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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.