Home / 670,722.13-1,006,085.36-420,879.25

Finding the Fourth Proportional to 670,722.13, 1,006,085.36 and 420,879.25

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Solution

The fourth proportional to 670,722.13, 1,006,085.36 and 420,879.25 is: 631,320.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,722.13 : 1,006,085.36 = 420,879.25 : x
  2. Step 2: Convert to fraction form
    670,722.13/1,006,085.36 = 420,879.25/x
  3. Step 3: Cross multiply
    670,722.13x = 1,006,085.36 × 420,879.25
  4. Step 4: Simplify right side
    670,722.13x = 423,440,451,752.78
  5. Step 5: Solve for x
    x = 423,440,451,752.78/670,722.13
  6. Step 6: Final answer
    x = 631,320.23

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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.