Home / 390,556.72-585,835.12-141,180.40

Finding the Fourth Proportional to 390,556.72, 585,835.12 and 141,180.40

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Solution

The fourth proportional to 390,556.72, 585,835.12 and 141,180.40 is: 211,770.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,556.72 : 585,835.12 = 141,180.40 : x
  2. Step 2: Convert to fraction form
    390,556.72/585,835.12 = 141,180.40/x
  3. Step 3: Cross multiply
    390,556.72x = 585,835.12 × 141,180.40
  4. Step 4: Simplify right side
    390,556.72x = 82,708,436,575.65
  5. Step 5: Solve for x
    x = 82,708,436,575.65/390,556.72
  6. Step 6: Final answer
    x = 211,770.61

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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.