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Finding the Fourth Proportional to 258,305.40, 386,364.60 and 231,842.70

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Solution

The fourth proportional to 258,305.40, 386,364.60 and 231,842.70 is: 346,782.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,305.40 : 386,364.60 = 231,842.70 : x
  2. Step 2: Convert to fraction form
    258,305.40/386,364.60 = 231,842.70/x
  3. Step 3: Cross multiply
    258,305.40x = 386,364.60 × 231,842.70
  4. Step 4: Simplify right side
    258,305.40x = 89,575,812,048.42
  5. Step 5: Solve for x
    x = 89,575,812,048.42/258,305.40
  6. Step 6: Final answer
    x = 346,782.58

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1.5x scale

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.