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Finding the Fourth Proportional to 1,565.51, 2,159.22 and 935.99

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Solution

The fourth proportional to 1,565.51, 2,159.22 and 935.99 is: 1,290.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,565.51 : 2,159.22 = 935.99 : x
  2. Step 2: Convert to fraction form
    1,565.51/2,159.22 = 935.99/x
  3. Step 3: Cross multiply
    1,565.51x = 2,159.22 × 935.99
  4. Step 4: Simplify right side
    1,565.51x = 2,021,008.33
  5. Step 5: Solve for x
    x = 2,021,008.33/1,565.51
  6. Step 6: Final answer
    x = 1,290.96

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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.