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Finding the Fourth Proportional to 716.15, 990.09 and 529.35

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Solution

The fourth proportional to 716.15, 990.09 and 529.35 is: 731.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.15 : 990.09 = 529.35 : x
  2. Step 2: Convert to fraction form
    716.15/990.09 = 529.35/x
  3. Step 3: Cross multiply
    716.15x = 990.09 × 529.35
  4. Step 4: Simplify right side
    716.15x = 524,100.51
  5. Step 5: Solve for x
    x = 524,100.51/716.15
  6. Step 6: Final answer
    x = 731.83

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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.