Home / 1,565.11-2,159.62-1,005.63

Finding the Fourth Proportional to 1,565.11, 2,159.62 and 1,005.63

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Solution

The fourth proportional to 1,565.11, 2,159.62 and 1,005.63 is: 1,387.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,565.11 : 2,159.62 = 1,005.63 : x
  2. Step 2: Convert to fraction form
    1,565.11/2,159.62 = 1,005.63/x
  3. Step 3: Cross multiply
    1,565.11x = 2,159.62 × 1,005.63
  4. Step 4: Simplify right side
    1,565.11x = 2,171,778.66
  5. Step 5: Solve for x
    x = 2,171,778.66/1,565.11
  6. Step 6: Final answer
    x = 1,387.62

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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.