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Finding the Fourth Proportional to 546,721.80, 820,212.30 and 280,523.40

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Solution

The fourth proportional to 546,721.80, 820,212.30 and 280,523.40 is: 420,851.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    546,721.80 : 820,212.30 = 280,523.40 : x
  2. Step 2: Convert to fraction form
    546,721.80/820,212.30 = 280,523.40/x
  3. Step 3: Cross multiply
    546,721.80x = 820,212.30 × 280,523.40
  4. Step 4: Simplify right side
    546,721.80x = 230,088,743,117.82
  5. Step 5: Solve for x
    x = 230,088,743,117.82/546,721.80
  6. Step 6: Final answer
    x = 420,851.60

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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.