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Finding the Fourth Proportional to 824,647.80, 1,236,251.70 and 319,553.40

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Solution

The fourth proportional to 824,647.80, 1,236,251.70 and 319,553.40 is: 479,051.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    824,647.80 : 1,236,251.70 = 319,553.40 : x
  2. Step 2: Convert to fraction form
    824,647.80/1,236,251.70 = 319,553.40/x
  3. Step 3: Cross multiply
    824,647.80x = 1,236,251.70 × 319,553.40
  4. Step 4: Simplify right side
    824,647.80x = 395,048,433,990.78
  5. Step 5: Solve for x
    x = 395,048,433,990.78/824,647.80
  6. Step 6: Final answer
    x = 479,051.10

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1.5x scale

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.