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Finding the Fourth Proportional to 716.34, 989.10 and 520.32

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Solution

The fourth proportional to 716.34, 989.10 and 520.32 is: 718.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.34 : 989.10 = 520.32 : x
  2. Step 2: Convert to fraction form
    716.34/989.10 = 520.32/x
  3. Step 3: Cross multiply
    716.34x = 989.10 × 520.32
  4. Step 4: Simplify right side
    716.34x = 514,648.51
  5. Step 5: Solve for x
    x = 514,648.51/716.34
  6. Step 6: Final answer
    x = 718.44

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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.