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Finding the Fourth Proportional to 313,300.80, 469,951.20 and 76,640.40

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Solution

The fourth proportional to 313,300.80, 469,951.20 and 76,640.40 is: 114,960.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,300.80 : 469,951.20 = 76,640.40 : x
  2. Step 2: Convert to fraction form
    313,300.80/469,951.20 = 76,640.40/x
  3. Step 3: Cross multiply
    313,300.80x = 469,951.20 × 76,640.40
  4. Step 4: Simplify right side
    313,300.80x = 36,017,247,948.48
  5. Step 5: Solve for x
    x = 36,017,247,948.48/313,300.80
  6. Step 6: Final answer
    x = 114,960.60

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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.