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Finding the Fourth Proportional to 546,612.80, 820,072.80 and 266,139.20

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Solution

The fourth proportional to 546,612.80, 820,072.80 and 266,139.20 is: 399,283.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    546,612.80 : 820,072.80 = 266,139.20 : x
  2. Step 2: Convert to fraction form
    546,612.80/820,072.80 = 266,139.20/x
  3. Step 3: Cross multiply
    546,612.80x = 820,072.80 × 266,139.20
  4. Step 4: Simplify right side
    546,612.80x = 218,253,518,933.76
  5. Step 5: Solve for x
    x = 218,253,518,933.76/546,612.80
  6. Step 6: Final answer
    x = 399,283.59

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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.