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Finding the Fourth Proportional to 259,640.40, 389,633.40 and 147,320.40

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Solution

The fourth proportional to 259,640.40, 389,633.40 and 147,320.40 is: 221,078.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,640.40 : 389,633.40 = 147,320.40 : x
  2. Step 2: Convert to fraction form
    259,640.40/389,633.40 = 147,320.40/x
  3. Step 3: Cross multiply
    259,640.40x = 389,633.40 × 147,320.40
  4. Step 4: Simplify right side
    259,640.40x = 57,400,948,341.36
  5. Step 5: Solve for x
    x = 57,400,948,341.36/259,640.40
  6. Step 6: Final answer
    x = 221,078.65

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1.5x scale

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.