Home / 670,721.13-1,006,083.86-420,878.25

Finding the Fourth Proportional to 670,721.13, 1,006,083.86 and 420,878.25

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Solution

The fourth proportional to 670,721.13, 1,006,083.86 and 420,878.25 is: 631,318.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,721.13 : 1,006,083.86 = 420,878.25 : x
  2. Step 2: Convert to fraction form
    670,721.13/1,006,083.86 = 420,878.25/x
  3. Step 3: Cross multiply
    670,721.13x = 1,006,083.86 × 420,878.25
  4. Step 4: Simplify right side
    670,721.13x = 423,438,812,245.65
  5. Step 5: Solve for x
    x = 423,438,812,245.65/670,721.13
  6. Step 6: Final answer
    x = 631,318.73

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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.