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Finding the Fourth Proportional to 390,939.28, 585,342.38 and 295,881.93

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Solution

The fourth proportional to 390,939.28, 585,342.38 and 295,881.93 is: 443,015.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,939.28 : 585,342.38 = 295,881.93 : x
  2. Step 2: Convert to fraction form
    390,939.28/585,342.38 = 295,881.93/x
  3. Step 3: Cross multiply
    390,939.28x = 585,342.38 × 295,881.93
  4. Step 4: Simplify right side
    390,939.28x = 173,192,233,105.19
  5. Step 5: Solve for x
    x = 173,192,233,105.19/390,939.28
  6. Step 6: Final answer
    x = 443,015.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.