Home / 389,722.80-584,584.20-310,407.60

Finding the Fourth Proportional to 389,722.80, 584,584.20 and 310,407.60

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Solution

The fourth proportional to 389,722.80, 584,584.20 and 310,407.60 is: 465,611.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,722.80 : 584,584.20 = 310,407.60 : x
  2. Step 2: Convert to fraction form
    389,722.80/584,584.20 = 310,407.60/x
  3. Step 3: Cross multiply
    389,722.80x = 584,584.20 × 310,407.60
  4. Step 4: Simplify right side
    389,722.80x = 181,459,378,519.92
  5. Step 5: Solve for x
    x = 181,459,378,519.92/389,722.80
  6. Step 6: Final answer
    x = 465,611.40

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Similar ratio
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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.