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Finding the Fourth Proportional to 934.40, 1,288.90 and 672.77

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Solution

The fourth proportional to 934.40, 1,288.90 and 672.77 is: 928.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.40 : 1,288.90 = 672.77 : x
  2. Step 2: Convert to fraction form
    934.40/1,288.90 = 672.77/x
  3. Step 3: Cross multiply
    934.40x = 1,288.90 × 672.77
  4. Step 4: Simplify right side
    934.40x = 867,133.25
  5. Step 5: Solve for x
    x = 867,133.25/934.40
  6. Step 6: Final answer
    x = 928.01

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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.