Home / 287,972.40-431,958.60-162,001.20

Finding the Fourth Proportional to 287,972.40, 431,958.60 and 162,001.20

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Solution

The fourth proportional to 287,972.40, 431,958.60 and 162,001.20 is: 243,001.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,972.40 : 431,958.60 = 162,001.20 : x
  2. Step 2: Convert to fraction form
    287,972.40/431,958.60 = 162,001.20/x
  3. Step 3: Cross multiply
    287,972.40x = 431,958.60 × 162,001.20
  4. Step 4: Simplify right side
    287,972.40x = 69,977,811,550.32
  5. Step 5: Solve for x
    x = 69,977,811,550.32/287,972.40
  6. Step 6: Final answer
    x = 243,001.80

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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.