Home / 820,871.70-1,231,307.55-442,958.10

Finding the Fourth Proportional to 820,871.70, 1,231,307.55 and 442,958.10

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Solution

The fourth proportional to 820,871.70, 1,231,307.55 and 442,958.10 is: 664,437.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,871.70 : 1,231,307.55 = 442,958.10 : x
  2. Step 2: Convert to fraction form
    820,871.70/1,231,307.55 = 442,958.10/x
  3. Step 3: Cross multiply
    820,871.70x = 1,231,307.55 × 442,958.10
  4. Step 4: Simplify right side
    820,871.70x = 545,417,652,863.66
  5. Step 5: Solve for x
    x = 545,417,652,863.66/820,871.70
  6. Step 6: Final answer
    x = 664,437.15

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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.