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Finding the Fourth Proportional to 280,495.72, 387,081.54 and 153,170.92

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Solution

The fourth proportional to 280,495.72, 387,081.54 and 153,170.92 is: 211,374.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,495.72 : 387,081.54 = 153,170.92 : x
  2. Step 2: Convert to fraction form
    280,495.72/387,081.54 = 153,170.92/x
  3. Step 3: Cross multiply
    280,495.72x = 387,081.54 × 153,170.92
  4. Step 4: Simplify right side
    280,495.72x = 59,289,635,596.82
  5. Step 5: Solve for x
    x = 59,289,635,596.82/280,495.72
  6. Step 6: Final answer
    x = 211,374.48

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1.5x scale

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.