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Finding the Fourth Proportional to 272,978.40, 409,726.80 and 168,002.40

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Solution

The fourth proportional to 272,978.40, 409,726.80 and 168,002.40 is: 252,163.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,978.40 : 409,726.80 = 168,002.40 : x
  2. Step 2: Convert to fraction form
    272,978.40/409,726.80 = 168,002.40/x
  3. Step 3: Cross multiply
    272,978.40x = 409,726.80 × 168,002.40
  4. Step 4: Simplify right side
    272,978.40x = 68,835,085,744.32
  5. Step 5: Solve for x
    x = 68,835,085,744.32/272,978.40
  6. Step 6: Final answer
    x = 252,163.12

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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.