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Finding the Fourth Proportional to 413,758.40, 620,637.60 and 272,040.80

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Solution

The fourth proportional to 413,758.40, 620,637.60 and 272,040.80 is: 408,061.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,758.40 : 620,637.60 = 272,040.80 : x
  2. Step 2: Convert to fraction form
    413,758.40/620,637.60 = 272,040.80/x
  3. Step 3: Cross multiply
    413,758.40x = 620,637.60 × 272,040.80
  4. Step 4: Simplify right side
    413,758.40x = 168,838,749,214.08
  5. Step 5: Solve for x
    x = 168,838,749,214.08/413,758.40
  6. Step 6: Final answer
    x = 408,061.20

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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.