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Finding the Fourth Proportional to 317,839.40, 476,321.70 and 210,919.40

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Solution

The fourth proportional to 317,839.40, 476,321.70 and 210,919.40 is: 316,088.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,839.40 : 476,321.70 = 210,919.40 : x
  2. Step 2: Convert to fraction form
    317,839.40/476,321.70 = 210,919.40/x
  3. Step 3: Cross multiply
    317,839.40x = 476,321.70 × 210,919.40
  4. Step 4: Simplify right side
    317,839.40x = 100,465,487,170.98
  5. Step 5: Solve for x
    x = 100,465,487,170.98/317,839.40
  6. Step 6: Final answer
    x = 316,088.84

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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.