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Finding the Fourth Proportional to 398,395.34, 549,769.57 and 217,103.41

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Solution

The fourth proportional to 398,395.34, 549,769.57 and 217,103.41 is: 299,593.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,395.34 : 549,769.57 = 217,103.41 : x
  2. Step 2: Convert to fraction form
    398,395.34/549,769.57 = 217,103.41/x
  3. Step 3: Cross multiply
    398,395.34x = 549,769.57 × 217,103.41
  4. Step 4: Simplify right side
    398,395.34x = 119,356,846,481.79
  5. Step 5: Solve for x
    x = 119,356,846,481.79/398,395.34
  6. Step 6: Final answer
    x = 299,593.98

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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.