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Finding the Fourth Proportional to 390,294.54, 538,592.76 and 220,525.02

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Solution

The fourth proportional to 390,294.54, 538,592.76 and 220,525.02 is: 304,316.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,294.54 : 538,592.76 = 220,525.02 : x
  2. Step 2: Convert to fraction form
    390,294.54/538,592.76 = 220,525.02/x
  3. Step 3: Cross multiply
    390,294.54x = 538,592.76 × 220,525.02
  4. Step 4: Simplify right side
    390,294.54x = 118,773,179,170.86
  5. Step 5: Solve for x
    x = 118,773,179,170.86/390,294.54
  6. Step 6: Final answer
    x = 304,316.78

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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.