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Finding the Fourth Proportional to 307,412.28, 424,228.05 and 171,446.40

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Solution

The fourth proportional to 307,412.28, 424,228.05 and 171,446.40 is: 236,595.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,412.28 : 424,228.05 = 171,446.40 : x
  2. Step 2: Convert to fraction form
    307,412.28/424,228.05 = 171,446.40/x
  3. Step 3: Cross multiply
    307,412.28x = 424,228.05 × 171,446.40
  4. Step 4: Simplify right side
    307,412.28x = 72,732,371,951.52
  5. Step 5: Solve for x
    x = 72,732,371,951.52/307,412.28
  6. Step 6: Final answer
    x = 236,595.53

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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.