Home / 389,909.60-538,014.57-220,140.08

Finding the Fourth Proportional to 389,909.60, 538,014.57 and 220,140.08

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Solution

The fourth proportional to 389,909.60, 538,014.57 and 220,140.08 is: 303,759.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,909.60 : 538,014.57 = 220,140.08 : x
  2. Step 2: Convert to fraction form
    389,909.60/538,014.57 = 220,140.08/x
  3. Step 3: Cross multiply
    389,909.60x = 538,014.57 × 220,140.08
  4. Step 4: Simplify right side
    389,909.60x = 118,438,567,790.89
  5. Step 5: Solve for x
    x = 118,438,567,790.89/389,909.60
  6. Step 6: Final answer
    x = 303,759.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.