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Finding the Fourth Proportional to 280,662.44, 387,319.74 and 153,345.92

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Solution

The fourth proportional to 280,662.44, 387,319.74 and 153,345.92 is: 211,620.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,662.44 : 387,319.74 = 153,345.92 : x
  2. Step 2: Convert to fraction form
    280,662.44/387,319.74 = 153,345.92/x
  3. Step 3: Cross multiply
    280,662.44x = 387,319.74 × 153,345.92
  4. Step 4: Simplify right side
    280,662.44x = 59,393,901,864.46
  5. Step 5: Solve for x
    x = 59,393,901,864.46/280,662.44
  6. Step 6: Final answer
    x = 211,620.41

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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.