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Finding the Fourth Proportional to 312,008.20, 468,012.30 and 172,040.20

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Solution

The fourth proportional to 312,008.20, 468,012.30 and 172,040.20 is: 258,060.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,008.20 : 468,012.30 = 172,040.20 : x
  2. Step 2: Convert to fraction form
    312,008.20/468,012.30 = 172,040.20/x
  3. Step 3: Cross multiply
    312,008.20x = 468,012.30 × 172,040.20
  4. Step 4: Simplify right side
    312,008.20x = 80,516,929,694.46
  5. Step 5: Solve for x
    x = 80,516,929,694.46/312,008.20
  6. Step 6: Final answer
    x = 258,060.30

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1.5x scale

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.