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Finding the Fourth Proportional to 315,935.41, 474,034.97 and 138,569.71

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Solution

The fourth proportional to 315,935.41, 474,034.97 and 138,569.71 is: 207,912.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,935.41 : 474,034.97 = 138,569.71 : x
  2. Step 2: Convert to fraction form
    315,935.41/474,034.97 = 138,569.71/x
  3. Step 3: Cross multiply
    315,935.41x = 474,034.97 × 138,569.71
  4. Step 4: Simplify right side
    315,935.41x = 65,686,888,322.76
  5. Step 5: Solve for x
    x = 65,686,888,322.76/315,935.41
  6. Step 6: Final answer
    x = 207,912.40

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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.