Home / 280,971.76-387,741.18-153,659.20

Finding the Fourth Proportional to 280,971.76, 387,741.18 and 153,659.20

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Solution

The fourth proportional to 280,971.76, 387,741.18 and 153,659.20 is: 212,049.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,971.76 : 387,741.18 = 153,659.20 : x
  2. Step 2: Convert to fraction form
    280,971.76/387,741.18 = 153,659.20/x
  3. Step 3: Cross multiply
    280,971.76x = 387,741.18 × 153,659.20
  4. Step 4: Simplify right side
    280,971.76x = 59,579,999,525.86
  5. Step 5: Solve for x
    x = 59,579,999,525.86/280,971.76
  6. Step 6: Final answer
    x = 212,049.78

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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.