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Finding the Fourth Proportional to 290,780.70, 400,919.67 and 236,867.10

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Solution

The fourth proportional to 290,780.70, 400,919.67 and 236,867.10 is: 326,585.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,780.70 : 400,919.67 = 236,867.10 : x
  2. Step 2: Convert to fraction form
    290,780.70/400,919.67 = 236,867.10/x
  3. Step 3: Cross multiply
    290,780.70x = 400,919.67 × 236,867.10
  4. Step 4: Simplify right side
    290,780.70x = 94,964,679,565.86
  5. Step 5: Solve for x
    x = 94,964,679,565.86/290,780.70
  6. Step 6: Final answer
    x = 326,585.22

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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.