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Finding the Fourth Proportional to 1,565.91, 2,160.94 and 902.72

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Solution

The fourth proportional to 1,565.91, 2,160.94 and 902.72 is: 1,245.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,565.91 : 2,160.94 = 902.72 : x
  2. Step 2: Convert to fraction form
    1,565.91/2,160.94 = 902.72/x
  3. Step 3: Cross multiply
    1,565.91x = 2,160.94 × 902.72
  4. Step 4: Simplify right side
    1,565.91x = 1,950,723.76
  5. Step 5: Solve for x
    x = 1,950,723.76/1,565.91
  6. Step 6: Final answer
    x = 1,245.74

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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.