Home / 1,189,320.45-1,641,263.06-645,456.10

Finding the Fourth Proportional to 1,189,320.45, 1,641,263.06 and 645,456.10

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Solution

The fourth proportional to 1,189,320.45, 1,641,263.06 and 645,456.10 is: 890,729.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189,320.45 : 1,641,263.06 = 645,456.10 : x
  2. Step 2: Convert to fraction form
    1,189,320.45/1,641,263.06 = 645,456.10/x
  3. Step 3: Cross multiply
    1,189,320.45x = 1,641,263.06 × 645,456.10
  4. Step 4: Simplify right side
    1,189,320.45x = 1,059,363,253,781.67
  5. Step 5: Solve for x
    x = 1,059,363,253,781.67/1,189,320.45
  6. Step 6: Final answer
    x = 890,729.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.