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Finding the Fourth Proportional to 390,264.04, 538,654.37 and 254,060.76

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Solution

The fourth proportional to 390,264.04, 538,654.37 and 254,060.76 is: 350,662.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,264.04 : 538,654.37 = 254,060.76 : x
  2. Step 2: Convert to fraction form
    390,264.04/538,654.37 = 254,060.76/x
  3. Step 3: Cross multiply
    390,264.04x = 538,654.37 × 254,060.76
  4. Step 4: Simplify right side
    390,264.04x = 136,850,938,619.52
  5. Step 5: Solve for x
    x = 136,850,938,619.52/390,264.04
  6. Step 6: Final answer
    x = 350,662.44

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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.