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Finding the Fourth Proportional to 956.77, 1,320.33 and 558.70

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Solution

The fourth proportional to 956.77, 1,320.33 and 558.70 is: 771.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.77 : 1,320.33 = 558.70 : x
  2. Step 2: Convert to fraction form
    956.77/1,320.33 = 558.70/x
  3. Step 3: Cross multiply
    956.77x = 1,320.33 × 558.70
  4. Step 4: Simplify right side
    956.77x = 737,665.07
  5. Step 5: Solve for x
    x = 737,665.07/956.77
  6. Step 6: Final answer
    x = 771.00

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Double scale
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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.