Home / 485,327.40-727,991.10-317,365.80

Finding the Fourth Proportional to 485,327.40, 727,991.10 and 317,365.80

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Solution

The fourth proportional to 485,327.40, 727,991.10 and 317,365.80 is: 476,048.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,327.40 : 727,991.10 = 317,365.80 : x
  2. Step 2: Convert to fraction form
    485,327.40/727,991.10 = 317,365.80/x
  3. Step 3: Cross multiply
    485,327.40x = 727,991.10 × 317,365.80
  4. Step 4: Simplify right side
    485,327.40x = 231,039,477,844.38
  5. Step 5: Solve for x
    x = 231,039,477,844.38/485,327.40
  6. Step 6: Final answer
    x = 476,048.70

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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.