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Finding the Fourth Proportional to 2,565.12, 3,848.03 and 921.29

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Solution

The fourth proportional to 2,565.12, 3,848.03 and 921.29 is: 1,382.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,565.12 : 3,848.03 = 921.29 : x
  2. Step 2: Convert to fraction form
    2,565.12/3,848.03 = 921.29/x
  3. Step 3: Cross multiply
    2,565.12x = 3,848.03 × 921.29
  4. Step 4: Simplify right side
    2,565.12x = 3,545,127.71
  5. Step 5: Solve for x
    x = 3,545,127.71/2,565.12
  6. Step 6: Final answer
    x = 1,382.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.