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Finding the Fourth Proportional to 1,354.32, 1,868.36 and 956.57

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Solution

The fourth proportional to 1,354.32, 1,868.36 and 956.57 is: 1,319.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,354.32 : 1,868.36 = 956.57 : x
  2. Step 2: Convert to fraction form
    1,354.32/1,868.36 = 956.57/x
  3. Step 3: Cross multiply
    1,354.32x = 1,868.36 × 956.57
  4. Step 4: Simplify right side
    1,354.32x = 1,787,203.00
  5. Step 5: Solve for x
    x = 1,787,203.00/1,354.32
  6. Step 6: Final answer
    x = 1,319.63

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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.