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Finding the Fourth Proportional to 307,686.60, 424,607.90 and 171,720.54

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Solution

The fourth proportional to 307,686.60, 424,607.90 and 171,720.54 is: 236,974.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,686.60 : 424,607.90 = 171,720.54 : x
  2. Step 2: Convert to fraction form
    307,686.60/424,607.90 = 171,720.54/x
  3. Step 3: Cross multiply
    307,686.60x = 424,607.90 × 171,720.54
  4. Step 4: Simplify right side
    307,686.60x = 72,913,897,876.27
  5. Step 5: Solve for x
    x = 72,913,897,876.27/307,686.60
  6. Step 6: Final answer
    x = 236,974.56

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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.