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Finding the Fourth Proportional to 1,565.89, 2,160.94 and 902.74

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Solution

The fourth proportional to 1,565.89, 2,160.94 and 902.74 is: 1,245.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,565.89 : 2,160.94 = 902.74 : x
  2. Step 2: Convert to fraction form
    1,565.89/2,160.94 = 902.74/x
  3. Step 3: Cross multiply
    1,565.89x = 2,160.94 × 902.74
  4. Step 4: Simplify right side
    1,565.89x = 1,950,766.98
  5. Step 5: Solve for x
    x = 1,950,766.98/1,565.89
  6. Step 6: Final answer
    x = 1,245.79

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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.