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Finding the Fourth Proportional to 240,472.80, 360,709.20 and 128,498.40

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Solution

The fourth proportional to 240,472.80, 360,709.20 and 128,498.40 is: 192,747.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    240,472.80 : 360,709.20 = 128,498.40 : x
  2. Step 2: Convert to fraction form
    240,472.80/360,709.20 = 128,498.40/x
  3. Step 3: Cross multiply
    240,472.80x = 360,709.20 × 128,498.40
  4. Step 4: Simplify right side
    240,472.80x = 46,350,555,065.28
  5. Step 5: Solve for x
    x = 46,350,555,065.28/240,472.80
  6. Step 6: Final answer
    x = 192,747.60

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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.