Home / 280,890.06-387,628.26-153,565.62

Finding the Fourth Proportional to 280,890.06, 387,628.26 and 153,565.62

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Solution

The fourth proportional to 280,890.06, 387,628.26 and 153,565.62 is: 211,920.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,890.06 : 387,628.26 = 153,565.62 : x
  2. Step 2: Convert to fraction form
    280,890.06/387,628.26 = 153,565.62/x
  3. Step 3: Cross multiply
    280,890.06x = 387,628.26 × 153,565.62
  4. Step 4: Simplify right side
    280,890.06x = 59,526,374,076.42
  5. Step 5: Solve for x
    x = 59,526,374,076.42/280,890.06
  6. Step 6: Final answer
    x = 211,920.54

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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.