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Finding the Fourth Proportional to 390,796.92, 539,300.70 and 211,948.92

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Solution

The fourth proportional to 390,796.92, 539,300.70 and 211,948.92 is: 292,490.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,796.92 : 539,300.70 = 211,948.92 : x
  2. Step 2: Convert to fraction form
    390,796.92/539,300.70 = 211,948.92/x
  3. Step 3: Cross multiply
    390,796.92x = 539,300.70 × 211,948.92
  4. Step 4: Simplify right side
    390,796.92x = 114,304,200,920.24
  5. Step 5: Solve for x
    x = 114,304,200,920.24/390,796.92
  6. Step 6: Final answer
    x = 292,490.03

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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.