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Finding the Fourth Proportional to 1,565.58, 2,160.75 and 902.31

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Solution

The fourth proportional to 1,565.58, 2,160.75 and 902.31 is: 1,245.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,565.58 : 2,160.75 = 902.31 : x
  2. Step 2: Convert to fraction form
    1,565.58/2,160.75 = 902.31/x
  3. Step 3: Cross multiply
    1,565.58x = 2,160.75 × 902.31
  4. Step 4: Simplify right side
    1,565.58x = 1,949,677.31
  5. Step 5: Solve for x
    x = 1,949,677.31/1,565.58
  6. Step 6: Final answer
    x = 1,245.34

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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.