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Finding the Fourth Proportional to 824,646.80, 1,236,250.20 and 319,552.40

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Solution

The fourth proportional to 824,646.80, 1,236,250.20 and 319,552.40 is: 479,049.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    824,646.80 : 1,236,250.20 = 319,552.40 : x
  2. Step 2: Convert to fraction form
    824,646.80/1,236,250.20 = 319,552.40/x
  3. Step 3: Cross multiply
    824,646.80x = 1,236,250.20 × 319,552.40
  4. Step 4: Simplify right side
    824,646.80x = 395,046,718,410.48
  5. Step 5: Solve for x
    x = 395,046,718,410.48/824,646.80
  6. Step 6: Final answer
    x = 479,049.60

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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.