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Finding the Fourth Proportional to 2,565.80, 3,848.70 and 922.40

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Solution

The fourth proportional to 2,565.80, 3,848.70 and 922.40 is: 1,383.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,565.80 : 3,848.70 = 922.40 : x
  2. Step 2: Convert to fraction form
    2,565.80/3,848.70 = 922.40/x
  3. Step 3: Cross multiply
    2,565.80x = 3,848.70 × 922.40
  4. Step 4: Simplify right side
    2,565.80x = 3,550,040.88
  5. Step 5: Solve for x
    x = 3,550,040.88/2,565.80
  6. Step 6: Final answer
    x = 1,383.60

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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.