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Finding the Fourth Proportional to 550,778.92, 760,013.22 and 309,011.20

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Solution

The fourth proportional to 550,778.92, 760,013.22 and 309,011.20 is: 426,400.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    550,778.92 : 760,013.22 = 309,011.20 : x
  2. Step 2: Convert to fraction form
    550,778.92/760,013.22 = 309,011.20/x
  3. Step 3: Cross multiply
    550,778.92x = 760,013.22 × 309,011.20
  4. Step 4: Simplify right side
    550,778.92x = 234,852,597,128.06
  5. Step 5: Solve for x
    x = 234,852,597,128.06/550,778.92
  6. Step 6: Final answer
    x = 426,400.85

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1.5x scale

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.