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Finding the Fourth Proportional to 561,079.91, 774,295.22 and 319,378.04

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Solution

The fourth proportional to 561,079.91, 774,295.22 and 319,378.04 is: 440,744.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,079.91 : 774,295.22 = 319,378.04 : x
  2. Step 2: Convert to fraction form
    561,079.91/774,295.22 = 319,378.04/x
  3. Step 3: Cross multiply
    561,079.91x = 774,295.22 × 319,378.04
  4. Step 4: Simplify right side
    561,079.91x = 247,292,891,680.71
  5. Step 5: Solve for x
    x = 247,292,891,680.71/561,079.91
  6. Step 6: Final answer
    x = 440,744.52

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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.