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Finding the Fourth Proportional to 1,242.97, 1,715.34 and 683.46

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Solution

The fourth proportional to 1,242.97, 1,715.34 and 683.46 is: 943.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,242.97 : 1,715.34 = 683.46 : x
  2. Step 2: Convert to fraction form
    1,242.97/1,715.34 = 683.46/x
  3. Step 3: Cross multiply
    1,242.97x = 1,715.34 × 683.46
  4. Step 4: Simplify right side
    1,242.97x = 1,172,366.28
  5. Step 5: Solve for x
    x = 1,172,366.28/1,242.97
  6. Step 6: Final answer
    x = 943.20

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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.