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Finding the Fourth Proportional to 390,029.52, 585,260.16 and 190,351.56

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Solution

The fourth proportional to 390,029.52, 585,260.16 and 190,351.56 is: 285,632.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,029.52 : 585,260.16 = 190,351.56 : x
  2. Step 2: Convert to fraction form
    390,029.52/585,260.16 = 190,351.56/x
  3. Step 3: Cross multiply
    390,029.52x = 585,260.16 × 190,351.56
  4. Step 4: Simplify right side
    390,029.52x = 111,405,184,461.85
  5. Step 5: Solve for x
    x = 111,405,184,461.85/390,029.52
  6. Step 6: Final answer
    x = 285,632.70

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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.