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Finding the Fourth Proportional to 387,679.69, 580,925.97 and 260,850.16

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Solution

The fourth proportional to 387,679.69, 580,925.97 and 260,850.16 is: 390,875.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,679.69 : 580,925.97 = 260,850.16 : x
  2. Step 2: Convert to fraction form
    387,679.69/580,925.97 = 260,850.16/x
  3. Step 3: Cross multiply
    387,679.69x = 580,925.97 × 260,850.16
  4. Step 4: Simplify right side
    387,679.69x = 151,534,632,222.66
  5. Step 5: Solve for x
    x = 151,534,632,222.66/387,679.69
  6. Step 6: Final answer
    x = 390,875.86

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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.