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Finding the Fourth Proportional to 634.47, 875.67 and 469.16

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Solution

The fourth proportional to 634.47, 875.67 and 469.16 is: 647.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.47 : 875.67 = 469.16 : x
  2. Step 2: Convert to fraction form
    634.47/875.67 = 469.16/x
  3. Step 3: Cross multiply
    634.47x = 875.67 × 469.16
  4. Step 4: Simplify right side
    634.47x = 410,824.96
  5. Step 5: Solve for x
    x = 410,824.96/634.47
  6. Step 6: Final answer
    x = 647.51

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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.