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Finding the Fourth Proportional to 307,872.71, 424,871.55 and 171,902.06

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Solution

The fourth proportional to 307,872.71, 424,871.55 and 171,902.06 is: 237,228.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,872.71 : 424,871.55 = 171,902.06 : x
  2. Step 2: Convert to fraction form
    307,872.71/424,871.55 = 171,902.06/x
  3. Step 3: Cross multiply
    307,872.71x = 424,871.55 × 171,902.06
  4. Step 4: Simplify right side
    307,872.71x = 73,036,294,680.39
  5. Step 5: Solve for x
    x = 73,036,294,680.39/307,872.71
  6. Step 6: Final answer
    x = 237,228.87

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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.