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Finding the Fourth Proportional to 387,931.98, 581,608.05 and 267,645.69

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Solution

The fourth proportional to 387,931.98, 581,608.05 and 267,645.69 is: 401,268.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,931.98 : 581,608.05 = 267,645.69 : x
  2. Step 2: Convert to fraction form
    387,931.98/581,608.05 = 267,645.69/x
  3. Step 3: Cross multiply
    387,931.98x = 581,608.05 × 267,645.69
  4. Step 4: Simplify right side
    387,931.98x = 155,664,884,943.76
  5. Step 5: Solve for x
    x = 155,664,884,943.76/387,931.98
  6. Step 6: Final answer
    x = 401,268.51

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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.