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Finding the Fourth Proportional to 315,816.68, 435,826.50 and 172,576.76

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Solution

The fourth proportional to 315,816.68, 435,826.50 and 172,576.76 is: 238,155.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,816.68 : 435,826.50 = 172,576.76 : x
  2. Step 2: Convert to fraction form
    315,816.68/435,826.50 = 172,576.76/x
  3. Step 3: Cross multiply
    315,816.68x = 435,826.50 × 172,576.76
  4. Step 4: Simplify right side
    315,816.68x = 75,213,525,292.14
  5. Step 5: Solve for x
    x = 75,213,525,292.14/315,816.68
  6. Step 6: Final answer
    x = 238,155.65

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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.