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Finding the Fourth Proportional to 951.85, 1,428 and 404.07

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Solution

The fourth proportional to 951.85, 1,428 and 404.07 is: 606.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.85 : 1,428 = 404.07 : x
  2. Step 2: Convert to fraction form
    951.85/1,428 = 404.07/x
  3. Step 3: Cross multiply
    951.85x = 1,428 × 404.07
  4. Step 4: Simplify right side
    951.85x = 577,011.96
  5. Step 5: Solve for x
    x = 577,011.96/951.85
  6. Step 6: Final answer
    x = 606.20

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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.