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Finding the Fourth Proportional to 280,469.91, 387,046.93 and 153,144.60

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Solution

The fourth proportional to 280,469.91, 387,046.93 and 153,144.60 is: 211,338.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,469.91 : 387,046.93 = 153,144.60 : x
  2. Step 2: Convert to fraction form
    280,469.91/387,046.93 = 153,144.60/x
  3. Step 3: Cross multiply
    280,469.91x = 387,046.93 × 153,144.60
  4. Step 4: Simplify right side
    280,469.91x = 59,274,147,276.08
  5. Step 5: Solve for x
    x = 59,274,147,276.08/280,469.91
  6. Step 6: Final answer
    x = 211,338.70

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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.