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Finding the Fourth Proportional to 313,291.80, 469,937.70 and 76,631.40

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Solution

The fourth proportional to 313,291.80, 469,937.70 and 76,631.40 is: 114,947.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,291.80 : 469,937.70 = 76,631.40 : x
  2. Step 2: Convert to fraction form
    313,291.80/469,937.70 = 76,631.40/x
  3. Step 3: Cross multiply
    313,291.80x = 469,937.70 × 76,631.40
  4. Step 4: Simplify right side
    313,291.80x = 36,011,983,863.78
  5. Step 5: Solve for x
    x = 36,011,983,863.78/313,291.80
  6. Step 6: Final answer
    x = 114,947.10

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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.