Home / 287,021.07-430,157.25-178,905.78

Finding the Fourth Proportional to 287,021.07, 430,157.25 and 178,905.78

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Solution

The fourth proportional to 287,021.07, 430,157.25 and 178,905.78 is: 268,125.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,021.07 : 430,157.25 = 178,905.78 : x
  2. Step 2: Convert to fraction form
    287,021.07/430,157.25 = 178,905.78/x
  3. Step 3: Cross multiply
    287,021.07x = 430,157.25 × 178,905.78
  4. Step 4: Simplify right side
    287,021.07x = 76,957,618,333.91
  5. Step 5: Solve for x
    x = 76,957,618,333.91/287,021.07
  6. Step 6: Final answer
    x = 268,125.33

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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.