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Finding the Fourth Proportional to 957.14, 1,320.85 and 559.07

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Solution

The fourth proportional to 957.14, 1,320.85 and 559.07 is: 771.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.14 : 1,320.85 = 559.07 : x
  2. Step 2: Convert to fraction form
    957.14/1,320.85 = 559.07/x
  3. Step 3: Cross multiply
    957.14x = 1,320.85 × 559.07
  4. Step 4: Simplify right side
    957.14x = 738,446.66
  5. Step 5: Solve for x
    x = 738,446.66/957.14
  6. Step 6: Final answer
    x = 771.51

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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.