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Finding the Fourth Proportional to 663,641.28, 995,465.52 and 165,005.28

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Solution

The fourth proportional to 663,641.28, 995,465.52 and 165,005.28 is: 247,508.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,641.28 : 995,465.52 = 165,005.28 : x
  2. Step 2: Convert to fraction form
    663,641.28/995,465.52 = 165,005.28/x
  3. Step 3: Cross multiply
    663,641.28x = 995,465.52 × 165,005.28
  4. Step 4: Simplify right side
    663,641.28x = 164,257,066,857.95
  5. Step 5: Solve for x
    x = 164,257,066,857.95/663,641.28
  6. Step 6: Final answer
    x = 247,508.82

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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.