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Finding the Fourth Proportional to 315,936.41, 474,036.47 and 138,570.71

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Solution

The fourth proportional to 315,936.41, 474,036.47 and 138,570.71 is: 207,913.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,936.41 : 474,036.47 = 138,570.71 : x
  2. Step 2: Convert to fraction form
    315,936.41/474,036.47 = 138,570.71/x
  3. Step 3: Cross multiply
    315,936.41x = 474,036.47 × 138,570.71
  4. Step 4: Simplify right side
    315,936.41x = 65,687,570,213.79
  5. Step 5: Solve for x
    x = 65,687,570,213.79/315,936.41
  6. Step 6: Final answer
    x = 207,913.90

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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.