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Finding the Fourth Proportional to 315,760.80, 435,756.18 and 172,529.74

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Solution

The fourth proportional to 315,760.80, 435,756.18 and 172,529.74 is: 238,094.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,760.80 : 435,756.18 = 172,529.74 : x
  2. Step 2: Convert to fraction form
    315,760.80/435,756.18 = 172,529.74/x
  3. Step 3: Cross multiply
    315,760.80x = 435,756.18 × 172,529.74
  4. Step 4: Simplify right side
    315,760.80x = 75,180,900,438.79
  5. Step 5: Solve for x
    x = 75,180,900,438.79/315,760.80
  6. Step 6: Final answer
    x = 238,094.47

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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.