Home / 1,221,315.28-1,832,139.28-422,382.40

Finding the Fourth Proportional to 1,221,315.28, 1,832,139.28 and 422,382.40

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Solution

The fourth proportional to 1,221,315.28, 1,832,139.28 and 422,382.40 is: 633,631.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221,315.28 : 1,832,139.28 = 422,382.40 : x
  2. Step 2: Convert to fraction form
    1,221,315.28/1,832,139.28 = 422,382.40/x
  3. Step 3: Cross multiply
    1,221,315.28x = 1,832,139.28 × 422,382.40
  4. Step 4: Simplify right side
    1,221,315.28x = 773,863,386,220.67
  5. Step 5: Solve for x
    x = 773,863,386,220.67/1,221,315.28
  6. Step 6: Final answer
    x = 633,631.13

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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.