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Finding the Fourth Proportional to 352,688.40, 528,865.68 and 136,648.32

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Solution

The fourth proportional to 352,688.40, 528,865.68 and 136,648.32 is: 204,907.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,688.40 : 528,865.68 = 136,648.32 : x
  2. Step 2: Convert to fraction form
    352,688.40/528,865.68 = 136,648.32/x
  3. Step 3: Cross multiply
    352,688.40x = 528,865.68 × 136,648.32
  4. Step 4: Simplify right side
    352,688.40x = 72,268,606,677.66
  5. Step 5: Solve for x
    x = 72,268,606,677.66/352,688.40
  6. Step 6: Final answer
    x = 204,907.81

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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.