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Finding the Fourth Proportional to 280,243.40, 386,624.80 and 172,626.80

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Solution

The fourth proportional to 280,243.40, 386,624.80 and 172,626.80 is: 238,156.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,243.40 : 386,624.80 = 172,626.80 : x
  2. Step 2: Convert to fraction form
    280,243.40/386,624.80 = 172,626.80/x
  3. Step 3: Cross multiply
    280,243.40x = 386,624.80 × 172,626.80
  4. Step 4: Simplify right side
    280,243.40x = 66,741,802,024.64
  5. Step 5: Solve for x
    x = 66,741,802,024.64/280,243.40
  6. Step 6: Final answer
    x = 238,156.55

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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.