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Finding the Fourth Proportional to 287,448.05, 431,224.05 and 118,876.86

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Solution

The fourth proportional to 287,448.05, 431,224.05 and 118,876.86 is: 178,336.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,448.05 : 431,224.05 = 118,876.86 : x
  2. Step 2: Convert to fraction form
    287,448.05/431,224.05 = 118,876.86/x
  3. Step 3: Cross multiply
    287,448.05x = 431,224.05 × 118,876.86
  4. Step 4: Simplify right side
    287,448.05x = 51,262,561,020.48
  5. Step 5: Solve for x
    x = 51,262,561,020.48/287,448.05
  6. Step 6: Final answer
    x = 178,336.79

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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.