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Finding the Fourth Proportional to 280,609.74, 387,249.95 and 153,293.54

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Solution

The fourth proportional to 280,609.74, 387,249.95 and 153,293.54 is: 211,549.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,609.74 : 387,249.95 = 153,293.54 : x
  2. Step 2: Convert to fraction form
    280,609.74/387,249.95 = 153,293.54/x
  3. Step 3: Cross multiply
    280,609.74x = 387,249.95 × 153,293.54
  4. Step 4: Simplify right side
    280,609.74x = 59,362,912,997.61
  5. Step 5: Solve for x
    x = 59,362,912,997.61/280,609.74
  6. Step 6: Final answer
    x = 211,549.72

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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.