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Finding the Fourth Proportional to 390,487.83, 585,731.76 and 203,863.83

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Solution

The fourth proportional to 390,487.83, 585,731.76 and 203,863.83 is: 305,795.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,487.83 : 585,731.76 = 203,863.83 : x
  2. Step 2: Convert to fraction form
    390,487.83/585,731.76 = 203,863.83/x
  3. Step 3: Cross multiply
    390,487.83x = 585,731.76 × 203,863.83
  4. Step 4: Simplify right side
    390,487.83x = 119,409,519,946.24
  5. Step 5: Solve for x
    x = 119,409,519,946.24/390,487.83
  6. Step 6: Final answer
    x = 305,795.75

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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.