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Finding the Fourth Proportional to 1,567.89, 2,163.92 and 904.61

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Solution

The fourth proportional to 1,567.89, 2,163.92 and 904.61 is: 1,248.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,567.89 : 2,163.92 = 904.61 : x
  2. Step 2: Convert to fraction form
    1,567.89/2,163.92 = 904.61/x
  3. Step 3: Cross multiply
    1,567.89x = 2,163.92 × 904.61
  4. Step 4: Simplify right side
    1,567.89x = 1,957,503.67
  5. Step 5: Solve for x
    x = 1,957,503.67/1,567.89
  6. Step 6: Final answer
    x = 1,248.50

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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.