Home / 287,558.20-431,337.30-77,217.40

Finding the Fourth Proportional to 287,558.20, 431,337.30 and 77,217.40

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Solution

The fourth proportional to 287,558.20, 431,337.30 and 77,217.40 is: 115,826.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,558.20 : 431,337.30 = 77,217.40 : x
  2. Step 2: Convert to fraction form
    287,558.20/431,337.30 = 77,217.40/x
  3. Step 3: Cross multiply
    287,558.20x = 431,337.30 × 77,217.40
  4. Step 4: Simplify right side
    287,558.20x = 33,306,744,829.02
  5. Step 5: Solve for x
    x = 33,306,744,829.02/287,558.20
  6. Step 6: Final answer
    x = 115,826.10

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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.