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Finding the Fourth Proportional to 315,618.45, 435,552.76 and 172,378.50

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Solution

The fourth proportional to 315,618.45, 435,552.76 and 172,378.50 is: 237,881.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,618.45 : 435,552.76 = 172,378.50 : x
  2. Step 2: Convert to fraction form
    315,618.45/435,552.76 = 172,378.50/x
  3. Step 3: Cross multiply
    315,618.45x = 435,552.76 × 172,378.50
  4. Step 4: Simplify right side
    315,618.45x = 75,079,930,021.81
  5. Step 5: Solve for x
    x = 75,079,930,021.81/315,618.45
  6. Step 6: Final answer
    x = 237,881.95

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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.