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Finding the Fourth Proportional to 753.16, 1,039.98 and 520.96

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Solution

The fourth proportional to 753.16, 1,039.98 and 520.96 is: 719.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    753.16 : 1,039.98 = 520.96 : x
  2. Step 2: Convert to fraction form
    753.16/1,039.98 = 520.96/x
  3. Step 3: Cross multiply
    753.16x = 1,039.98 × 520.96
  4. Step 4: Simplify right side
    753.16x = 541,787.98
  5. Step 5: Solve for x
    x = 541,787.98/753.16
  6. Step 6: Final answer
    x = 719.35

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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.