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Finding the Fourth Proportional to 390,508.07, 539,180.43 and 304,563.05

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Solution

The fourth proportional to 390,508.07, 539,180.43 and 304,563.05 is: 420,514.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,508.07 : 539,180.43 = 304,563.05 : x
  2. Step 2: Convert to fraction form
    390,508.07/539,180.43 = 304,563.05/x
  3. Step 3: Cross multiply
    390,508.07x = 539,180.43 × 304,563.05
  4. Step 4: Simplify right side
    390,508.07x = 164,214,433,565.21
  5. Step 5: Solve for x
    x = 164,214,433,565.21/390,508.07
  6. Step 6: Final answer
    x = 420,514.83

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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.