Home / 820,143.80-1,230,215.70-442,230.20

Finding the Fourth Proportional to 820,143.80, 1,230,215.70 and 442,230.20

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Solution

The fourth proportional to 820,143.80, 1,230,215.70 and 442,230.20 is: 663,345.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,143.80 : 1,230,215.70 = 442,230.20 : x
  2. Step 2: Convert to fraction form
    820,143.80/1,230,215.70 = 442,230.20/x
  3. Step 3: Cross multiply
    820,143.80x = 1,230,215.70 × 442,230.20
  4. Step 4: Simplify right side
    820,143.80x = 544,038,535,054.14
  5. Step 5: Solve for x
    x = 544,038,535,054.14/820,143.80
  6. Step 6: Final answer
    x = 663,345.30

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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.