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Finding the Fourth Proportional to 957.61, 1,320.87 and 761.59

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Solution

The fourth proportional to 957.61, 1,320.87 and 761.59 is: 1,050.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.61 : 1,320.87 = 761.59 : x
  2. Step 2: Convert to fraction form
    957.61/1,320.87 = 761.59/x
  3. Step 3: Cross multiply
    957.61x = 1,320.87 × 761.59
  4. Step 4: Simplify right side
    957.61x = 1,005,961.38
  5. Step 5: Solve for x
    x = 1,005,961.38/957.61
  6. Step 6: Final answer
    x = 1,050.49

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1.5x scale

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.