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Finding the Fourth Proportional to 352,689.40, 528,867.18 and 136,649.32

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Solution

The fourth proportional to 352,689.40, 528,867.18 and 136,649.32 is: 204,909.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,689.40 : 528,867.18 = 136,649.32 : x
  2. Step 2: Convert to fraction form
    352,689.40/528,867.18 = 136,649.32/x
  3. Step 3: Cross multiply
    352,689.40x = 528,867.18 × 136,649.32
  4. Step 4: Simplify right side
    352,689.40x = 72,269,340,517.32
  5. Step 5: Solve for x
    x = 72,269,340,517.32/352,689.40
  6. Step 6: Final answer
    x = 204,909.31

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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.