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Finding the Fourth Proportional to 272,616.60, 408,050.10 and 213,130.20

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Solution

The fourth proportional to 272,616.60, 408,050.10 and 213,130.20 is: 319,011.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,616.60 : 408,050.10 = 213,130.20 : x
  2. Step 2: Convert to fraction form
    272,616.60/408,050.10 = 213,130.20/x
  3. Step 3: Cross multiply
    272,616.60x = 408,050.10 × 213,130.20
  4. Step 4: Simplify right side
    272,616.60x = 86,967,799,423.02
  5. Step 5: Solve for x
    x = 86,967,799,423.02/272,616.60
  6. Step 6: Final answer
    x = 319,011.39

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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.