Home / 389,901.04-538,002.76-220,131.60

Finding the Fourth Proportional to 389,901.04, 538,002.76 and 220,131.60

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Solution

The fourth proportional to 389,901.04, 538,002.76 and 220,131.60 is: 303,747.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,901.04 : 538,002.76 = 220,131.60 : x
  2. Step 2: Convert to fraction form
    389,901.04/538,002.76 = 220,131.60/x
  3. Step 3: Cross multiply
    389,901.04x = 538,002.76 × 220,131.60
  4. Step 4: Simplify right side
    389,901.04x = 118,431,408,363.22
  5. Step 5: Solve for x
    x = 118,431,408,363.22/389,901.04
  6. Step 6: Final answer
    x = 303,747.35

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Double scale
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Similar ratio
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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.