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Finding the Fourth Proportional to 398,883.72, 550,461.30 and 217,599.72

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Solution

The fourth proportional to 398,883.72, 550,461.30 and 217,599.72 is: 300,288.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,883.72 : 550,461.30 = 217,599.72 : x
  2. Step 2: Convert to fraction form
    398,883.72/550,461.30 = 217,599.72/x
  3. Step 3: Cross multiply
    398,883.72x = 550,461.30 × 217,599.72
  4. Step 4: Simplify right side
    398,883.72x = 119,780,224,750.84
  5. Step 5: Solve for x
    x = 119,780,224,750.84/398,883.72
  6. Step 6: Final answer
    x = 300,288.58

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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.