Home / 287,815.20-431,139.60-163,010.40

Finding the Fourth Proportional to 287,815.20, 431,139.60 and 163,010.40

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Solution

The fourth proportional to 287,815.20, 431,139.60 and 163,010.40 is: 244,185.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,815.20 : 431,139.60 = 163,010.40 : x
  2. Step 2: Convert to fraction form
    287,815.20/431,139.60 = 163,010.40/x
  3. Step 3: Cross multiply
    287,815.20x = 431,139.60 × 163,010.40
  4. Step 4: Simplify right side
    287,815.20x = 70,280,238,651.84
  5. Step 5: Solve for x
    x = 70,280,238,651.84/287,815.20
  6. Step 6: Final answer
    x = 244,185.29

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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.