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Finding the Fourth Proportional to 267,686.40, 401,465.60 and 155,123.20

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Solution

The fourth proportional to 267,686.40, 401,465.60 and 155,123.20 is: 232,647.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    267,686.40 : 401,465.60 = 155,123.20 : x
  2. Step 2: Convert to fraction form
    267,686.40/401,465.60 = 155,123.20/x
  3. Step 3: Cross multiply
    267,686.40x = 401,465.60 × 155,123.20
  4. Step 4: Simplify right side
    267,686.40x = 62,276,628,561.92
  5. Step 5: Solve for x
    x = 62,276,628,561.92/267,686.40
  6. Step 6: Final answer
    x = 232,647.71

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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.