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Finding the Fourth Proportional to 280,570.92, 386,687.16 and 212,424.62

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Solution

The fourth proportional to 280,570.92, 386,687.16 and 212,424.62 is: 292,766.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,570.92 : 386,687.16 = 212,424.62 : x
  2. Step 2: Convert to fraction form
    280,570.92/386,687.16 = 212,424.62/x
  3. Step 3: Cross multiply
    280,570.92x = 386,687.16 × 212,424.62
  4. Step 4: Simplify right side
    280,570.92x = 82,141,871,088.44
  5. Step 5: Solve for x
    x = 82,141,871,088.44/280,570.92
  6. Step 6: Final answer
    x = 292,766.87

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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.