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Finding the Fourth Proportional to 280,989.39, 387,768.42 and 153,662.25

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Solution

The fourth proportional to 280,989.39, 387,768.42 and 153,662.25 is: 212,055.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,989.39 : 387,768.42 = 153,662.25 : x
  2. Step 2: Convert to fraction form
    280,989.39/387,768.42 = 153,662.25/x
  3. Step 3: Cross multiply
    280,989.39x = 387,768.42 × 153,662.25
  4. Step 4: Simplify right side
    280,989.39x = 59,585,367,896.15
  5. Step 5: Solve for x
    x = 59,585,367,896.15/280,989.39
  6. Step 6: Final answer
    x = 212,055.58

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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.