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Finding the Fourth Proportional to 272,312, 408,491.04 and 75,320

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Solution

The fourth proportional to 272,312, 408,491.04 and 75,320 is: 112,986.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,312 : 408,491.04 = 75,320 : x
  2. Step 2: Convert to fraction form
    272,312/408,491.04 = 75,320/x
  3. Step 3: Cross multiply
    272,312x = 408,491.04 × 75,320
  4. Step 4: Simplify right side
    272,312x = 30,767,545,132.80
  5. Step 5: Solve for x
    x = 30,767,545,132.80/272,312
  6. Step 6: Final answer
    x = 112,986.37

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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.