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Finding the Fourth Proportional to 390,599.60, 539,067.62 and 237,648.65

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Solution

The fourth proportional to 390,599.60, 539,067.62 and 237,648.65 is: 327,979.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,599.60 : 539,067.62 = 237,648.65 : x
  2. Step 2: Convert to fraction form
    390,599.60/539,067.62 = 237,648.65/x
  3. Step 3: Cross multiply
    390,599.60x = 539,067.62 × 237,648.65
  4. Step 4: Simplify right side
    390,599.60x = 128,108,690,050.50
  5. Step 5: Solve for x
    x = 128,108,690,050.50/390,599.60
  6. Step 6: Final answer
    x = 327,979.58

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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.