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Finding the Fourth Proportional to 800.49, 1,202.55 and 691.14

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Solution

The fourth proportional to 800.49, 1,202.55 and 691.14 is: 1,038.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    800.49 : 1,202.55 = 691.14 : x
  2. Step 2: Convert to fraction form
    800.49/1,202.55 = 691.14/x
  3. Step 3: Cross multiply
    800.49x = 1,202.55 × 691.14
  4. Step 4: Simplify right side
    800.49x = 831,130.41
  5. Step 5: Solve for x
    x = 831,130.41/800.49
  6. Step 6: Final answer
    x = 1,038.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.