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Finding the Fourth Proportional to 951.87, 1,428 and 404.05

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Solution

The fourth proportional to 951.87, 1,428 and 404.05 is: 606.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.87 : 1,428 = 404.05 : x
  2. Step 2: Convert to fraction form
    951.87/1,428 = 404.05/x
  3. Step 3: Cross multiply
    951.87x = 1,428 × 404.05
  4. Step 4: Simplify right side
    951.87x = 576,983.40
  5. Step 5: Solve for x
    x = 576,983.40/951.87
  6. Step 6: Final answer
    x = 606.16

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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.