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Finding the Fourth Proportional to 956.98, 1,437.36 and 917.56

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Solution

The fourth proportional to 956.98, 1,437.36 and 917.56 is: 1,378.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.98 : 1,437.36 = 917.56 : x
  2. Step 2: Convert to fraction form
    956.98/1,437.36 = 917.56/x
  3. Step 3: Cross multiply
    956.98x = 1,437.36 × 917.56
  4. Step 4: Simplify right side
    956.98x = 1,318,864.04
  5. Step 5: Solve for x
    x = 1,318,864.04/956.98
  6. Step 6: Final answer
    x = 1,378.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.