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Finding the Fourth Proportional to 259,760.40, 389,640.60 and 240,320.40

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Solution

The fourth proportional to 259,760.40, 389,640.60 and 240,320.40 is: 360,480.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,760.40 : 389,640.60 = 240,320.40 : x
  2. Step 2: Convert to fraction form
    259,760.40/389,640.60 = 240,320.40/x
  3. Step 3: Cross multiply
    259,760.40x = 389,640.60 × 240,320.40
  4. Step 4: Simplify right side
    259,760.40x = 93,638,584,848.24
  5. Step 5: Solve for x
    x = 93,638,584,848.24/259,760.40
  6. Step 6: Final answer
    x = 360,480.60

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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.