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Finding the Fourth Proportional to 932.77, 1,288.07 and 877.15

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Solution

The fourth proportional to 932.77, 1,288.07 and 877.15 is: 1,211.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.77 : 1,288.07 = 877.15 : x
  2. Step 2: Convert to fraction form
    932.77/1,288.07 = 877.15/x
  3. Step 3: Cross multiply
    932.77x = 1,288.07 × 877.15
  4. Step 4: Simplify right side
    932.77x = 1,129,830.60
  5. Step 5: Solve for x
    x = 1,129,830.60/932.77
  6. Step 6: Final answer
    x = 1,211.26

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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.