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Finding the Fourth Proportional to 287,440.05, 431,212.05 and 118,868.86

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Solution

The fourth proportional to 287,440.05, 431,212.05 and 118,868.86 is: 178,324.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,440.05 : 431,212.05 = 118,868.86 : x
  2. Step 2: Convert to fraction form
    287,440.05/431,212.05 = 118,868.86/x
  3. Step 3: Cross multiply
    287,440.05x = 431,212.05 × 118,868.86
  4. Step 4: Simplify right side
    287,440.05x = 51,257,684,801.76
  5. Step 5: Solve for x
    x = 51,257,684,801.76/287,440.05
  6. Step 6: Final answer
    x = 178,324.78

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1.5x scale

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.