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Finding the Fourth Proportional to 260,689.86, 390,373.02 and 218,458.89

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Solution

The fourth proportional to 260,689.86, 390,373.02 and 218,458.89 is: 327,133.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,689.86 : 390,373.02 = 218,458.89 : x
  2. Step 2: Convert to fraction form
    260,689.86/390,373.02 = 218,458.89/x
  3. Step 3: Cross multiply
    260,689.86x = 390,373.02 × 218,458.89
  4. Step 4: Simplify right side
    260,689.86x = 85,280,456,635.15
  5. Step 5: Solve for x
    x = 85,280,456,635.15/260,689.86
  6. Step 6: Final answer
    x = 327,133.77

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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.