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Finding the Fourth Proportional to 477.76, 714.64 and 402.65

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Solution

The fourth proportional to 477.76, 714.64 and 402.65 is: 602.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.76 : 714.64 = 402.65 : x
  2. Step 2: Convert to fraction form
    477.76/714.64 = 402.65/x
  3. Step 3: Cross multiply
    477.76x = 714.64 × 402.65
  4. Step 4: Simplify right side
    477.76x = 287,749.80
  5. Step 5: Solve for x
    x = 287,749.80/477.76
  6. Step 6: Final answer
    x = 602.29

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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.