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Finding the Fourth Proportional to 280,637.52, 387,259.44 and 153,286.08

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Solution

The fourth proportional to 280,637.52, 387,259.44 and 153,286.08 is: 211,523.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,637.52 : 387,259.44 = 153,286.08 : x
  2. Step 2: Convert to fraction form
    280,637.52/387,259.44 = 153,286.08/x
  3. Step 3: Cross multiply
    280,637.52x = 387,259.44 × 153,286.08
  4. Step 4: Simplify right side
    280,637.52x = 59,361,481,500.60
  5. Step 5: Solve for x
    x = 59,361,481,500.60/280,637.52
  6. Step 6: Final answer
    x = 211,523.68

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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.