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Finding the Fourth Proportional to 398,861.46, 550,432.33 and 217,574.20

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Solution

The fourth proportional to 398,861.46, 550,432.33 and 217,574.20 is: 300,254.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,861.46 : 550,432.33 = 217,574.20 : x
  2. Step 2: Convert to fraction form
    398,861.46/550,432.33 = 217,574.20/x
  3. Step 3: Cross multiply
    398,861.46x = 550,432.33 × 217,574.20
  4. Step 4: Simplify right side
    398,861.46x = 119,759,871,101.72
  5. Step 5: Solve for x
    x = 119,759,871,101.72/398,861.46
  6. Step 6: Final answer
    x = 300,254.31

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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.