Home / 287,298.28-396,478.02-159,985.72

Finding the Fourth Proportional to 287,298.28, 396,478.02 and 159,985.72

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Solution

The fourth proportional to 287,298.28, 396,478.02 and 159,985.72 is: 220,783.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,298.28 : 396,478.02 = 159,985.72 : x
  2. Step 2: Convert to fraction form
    287,298.28/396,478.02 = 159,985.72/x
  3. Step 3: Cross multiply
    287,298.28x = 396,478.02 × 159,985.72
  4. Step 4: Simplify right side
    287,298.28x = 63,430,821,493.87
  5. Step 5: Solve for x
    x = 63,430,821,493.87/287,298.28
  6. Step 6: Final answer
    x = 220,783.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.