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Finding the Fourth Proportional to 734.01, 1,012.85 and 615.55

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Solution

The fourth proportional to 734.01, 1,012.85 and 615.55 is: 849.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    734.01 : 1,012.85 = 615.55 : x
  2. Step 2: Convert to fraction form
    734.01/1,012.85 = 615.55/x
  3. Step 3: Cross multiply
    734.01x = 1,012.85 × 615.55
  4. Step 4: Simplify right side
    734.01x = 623,461.88
  5. Step 5: Solve for x
    x = 623,461.88/734.01
  6. Step 6: Final answer
    x = 849.39

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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.