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Finding the Fourth Proportional to 390,546.28, 538,941.54 and 220,770.28

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Solution

The fourth proportional to 390,546.28, 538,941.54 and 220,770.28 is: 304,656.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,546.28 : 538,941.54 = 220,770.28 : x
  2. Step 2: Convert to fraction form
    390,546.28/538,941.54 = 220,770.28/x
  3. Step 3: Cross multiply
    390,546.28x = 538,941.54 × 220,770.28
  4. Step 4: Simplify right side
    390,546.28x = 118,982,274,689.43
  5. Step 5: Solve for x
    x = 118,982,274,689.43/390,546.28
  6. Step 6: Final answer
    x = 304,656.02

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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.