Home / 315,819.78-435,826.14-172,576.80

Finding the Fourth Proportional to 315,819.78, 435,826.14 and 172,576.80

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Solution

The fourth proportional to 315,819.78, 435,826.14 and 172,576.80 is: 238,153.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,819.78 : 435,826.14 = 172,576.80 : x
  2. Step 2: Convert to fraction form
    315,819.78/435,826.14 = 172,576.80/x
  3. Step 3: Cross multiply
    315,819.78x = 435,826.14 × 172,576.80
  4. Step 4: Simplify right side
    315,819.78x = 75,213,480,597.55
  5. Step 5: Solve for x
    x = 75,213,480,597.55/315,819.78
  6. Step 6: Final answer
    x = 238,153.17

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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.