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Finding the Fourth Proportional to 737.89, 1,017.71 and 688.21

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Solution

The fourth proportional to 737.89, 1,017.71 and 688.21 is: 949.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    737.89 : 1,017.71 = 688.21 : x
  2. Step 2: Convert to fraction form
    737.89/1,017.71 = 688.21/x
  3. Step 3: Cross multiply
    737.89x = 1,017.71 × 688.21
  4. Step 4: Simplify right side
    737.89x = 700,394.76
  5. Step 5: Solve for x
    x = 700,394.76/737.89
  6. Step 6: Final answer
    x = 949.19

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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.