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Finding the Fourth Proportional to 287,011.84, 396,095.28 and 159,687.72

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Solution

The fourth proportional to 287,011.84, 396,095.28 and 159,687.72 is: 220,379.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,011.84 : 396,095.28 = 159,687.72 : x
  2. Step 2: Convert to fraction form
    287,011.84/396,095.28 = 159,687.72/x
  3. Step 3: Cross multiply
    287,011.84x = 396,095.28 × 159,687.72
  4. Step 4: Simplify right side
    287,011.84x = 63,251,552,165.96
  5. Step 5: Solve for x
    x = 63,251,552,165.96/287,011.84
  6. Step 6: Final answer
    x = 220,379.59

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1.5x scale

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.