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Finding the Fourth Proportional to 228,407.80, 342,627.90 and 70,648.96

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Solution

The fourth proportional to 228,407.80, 342,627.90 and 70,648.96 is: 105,978.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,407.80 : 342,627.90 = 70,648.96 : x
  2. Step 2: Convert to fraction form
    228,407.80/342,627.90 = 70,648.96/x
  3. Step 3: Cross multiply
    228,407.80x = 342,627.90 × 70,648.96
  4. Step 4: Simplify right side
    228,407.80x = 24,206,304,801.98
  5. Step 5: Solve for x
    x = 24,206,304,801.98/228,407.80
  6. Step 6: Final answer
    x = 105,978.45

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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.