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Finding the Fourth Proportional to 1,565.40, 2,159.84 and 902.28

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Solution

The fourth proportional to 1,565.40, 2,159.84 and 902.28 is: 1,244.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,565.40 : 2,159.84 = 902.28 : x
  2. Step 2: Convert to fraction form
    1,565.40/2,159.84 = 902.28/x
  3. Step 3: Cross multiply
    1,565.40x = 2,159.84 × 902.28
  4. Step 4: Simplify right side
    1,565.40x = 1,948,780.44
  5. Step 5: Solve for x
    x = 1,948,780.44/1,565.40
  6. Step 6: Final answer
    x = 1,244.91

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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.