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Finding the Fourth Proportional to 672.77, 1,012.89 and 615.37

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Solution

The fourth proportional to 672.77, 1,012.89 and 615.37 is: 926.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.77 : 1,012.89 = 615.37 : x
  2. Step 2: Convert to fraction form
    672.77/1,012.89 = 615.37/x
  3. Step 3: Cross multiply
    672.77x = 1,012.89 × 615.37
  4. Step 4: Simplify right side
    672.77x = 623,302.12
  5. Step 5: Solve for x
    x = 623,302.12/672.77
  6. Step 6: Final answer
    x = 926.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.