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Finding the Fourth Proportional to 607.20, 911.88 and 402

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Solution

The fourth proportional to 607.20, 911.88 and 402 is: 603.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.20 : 911.88 = 402 : x
  2. Step 2: Convert to fraction form
    607.20/911.88 = 402/x
  3. Step 3: Cross multiply
    607.20x = 911.88 × 402
  4. Step 4: Simplify right side
    607.20x = 366,575.76
  5. Step 5: Solve for x
    x = 366,575.76/607.20
  6. Step 6: Final answer
    x = 603.72

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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.