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Finding the Fourth Proportional to 390,174.58, 585,219.30 and 264,621.34

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Solution

The fourth proportional to 390,174.58, 585,219.30 and 264,621.34 is: 396,903.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,174.58 : 585,219.30 = 264,621.34 : x
  2. Step 2: Convert to fraction form
    390,174.58/585,219.30 = 264,621.34/x
  3. Step 3: Cross multiply
    390,174.58x = 585,219.30 × 264,621.34
  4. Step 4: Simplify right side
    390,174.58x = 154,861,515,359.86
  5. Step 5: Solve for x
    x = 154,861,515,359.86/390,174.58
  6. Step 6: Final answer
    x = 396,903.14

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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.