Home / 280,378.18-386,919.24-172,905.22

Finding the Fourth Proportional to 280,378.18, 386,919.24 and 172,905.22

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Solution

The fourth proportional to 280,378.18, 386,919.24 and 172,905.22 is: 238,607.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,378.18 : 386,919.24 = 172,905.22 : x
  2. Step 2: Convert to fraction form
    280,378.18/386,919.24 = 172,905.22/x
  3. Step 3: Cross multiply
    280,378.18x = 386,919.24 × 172,905.22
  4. Step 4: Simplify right side
    280,378.18x = 66,900,356,314.43
  5. Step 5: Solve for x
    x = 66,900,356,314.43/280,378.18
  6. Step 6: Final answer
    x = 238,607.57

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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.