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Finding the Fourth Proportional to 716.16, 987.63 and 476.79

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Solution

The fourth proportional to 716.16, 987.63 and 476.79 is: 657.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.16 : 987.63 = 476.79 : x
  2. Step 2: Convert to fraction form
    716.16/987.63 = 476.79/x
  3. Step 3: Cross multiply
    716.16x = 987.63 × 476.79
  4. Step 4: Simplify right side
    716.16x = 470,890.64
  5. Step 5: Solve for x
    x = 470,890.64/716.16
  6. Step 6: Final answer
    x = 657.52

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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.