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Finding the Fourth Proportional to 390,145.44, 585,336.12 and 276,513

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Solution

The fourth proportional to 390,145.44, 585,336.12 and 276,513 is: 414,853.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,145.44 : 585,336.12 = 276,513 : x
  2. Step 2: Convert to fraction form
    390,145.44/585,336.12 = 276,513/x
  3. Step 3: Cross multiply
    390,145.44x = 585,336.12 × 276,513
  4. Step 4: Simplify right side
    390,145.44x = 161,853,046,549.56
  5. Step 5: Solve for x
    x = 161,853,046,549.56/390,145.44
  6. Step 6: Final answer
    x = 414,853.10

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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.