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Finding the Fourth Proportional to 247,278.80, 370,918.20 and 142,302.80

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Solution

The fourth proportional to 247,278.80, 370,918.20 and 142,302.80 is: 213,454.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,278.80 : 370,918.20 = 142,302.80 : x
  2. Step 2: Convert to fraction form
    247,278.80/370,918.20 = 142,302.80/x
  3. Step 3: Cross multiply
    247,278.80x = 370,918.20 × 142,302.80
  4. Step 4: Simplify right side
    247,278.80x = 52,782,698,430.96
  5. Step 5: Solve for x
    x = 52,782,698,430.96/247,278.80
  6. Step 6: Final answer
    x = 213,454.20

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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.