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Finding the Fourth Proportional to 280,995.86, 387,766.43 and 153,668.72

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Solution

The fourth proportional to 280,995.86, 387,766.43 and 153,668.72 is: 212,058.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,995.86 : 387,766.43 = 153,668.72 : x
  2. Step 2: Convert to fraction form
    280,995.86/387,766.43 = 153,668.72/x
  3. Step 3: Cross multiply
    280,995.86x = 387,766.43 × 153,668.72
  4. Step 4: Simplify right side
    280,995.86x = 59,587,570,188.73
  5. Step 5: Solve for x
    x = 59,587,570,188.73/280,995.86
  6. Step 6: Final answer
    x = 212,058.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.