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Finding the Fourth Proportional to 802.56, 1,107.45 and 471

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Solution

The fourth proportional to 802.56, 1,107.45 and 471 is: 649.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.56 : 1,107.45 = 471 : x
  2. Step 2: Convert to fraction form
    802.56/1,107.45 = 471/x
  3. Step 3: Cross multiply
    802.56x = 1,107.45 × 471
  4. Step 4: Simplify right side
    802.56x = 521,608.95
  5. Step 5: Solve for x
    x = 521,608.95/802.56
  6. Step 6: Final answer
    x = 649.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.