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Finding the Fourth Proportional to 390,149.37, 585,556.21 and 153,658.13

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Solution

The fourth proportional to 390,149.37, 585,556.21 and 153,658.13 is: 230,618.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,149.37 : 585,556.21 = 153,658.13 : x
  2. Step 2: Convert to fraction form
    390,149.37/585,556.21 = 153,658.13/x
  3. Step 3: Cross multiply
    390,149.37x = 585,556.21 × 153,658.13
  4. Step 4: Simplify right side
    390,149.37x = 89,975,469,502.78
  5. Step 5: Solve for x
    x = 89,975,469,502.78/390,149.37
  6. Step 6: Final answer
    x = 230,618.01

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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.