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Finding the Fourth Proportional to 317,990.40, 476,985.60 and 313,324.80

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Solution

The fourth proportional to 317,990.40, 476,985.60 and 313,324.80 is: 469,987.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,990.40 : 476,985.60 = 313,324.80 : x
  2. Step 2: Convert to fraction form
    317,990.40/476,985.60 = 313,324.80/x
  3. Step 3: Cross multiply
    317,990.40x = 476,985.60 × 313,324.80
  4. Step 4: Simplify right side
    317,990.40x = 149,451,417,722.88
  5. Step 5: Solve for x
    x = 149,451,417,722.88/317,990.40
  6. Step 6: Final answer
    x = 469,987.20

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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.