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Finding the Fourth Proportional to 398,401.71, 549,794.46 and 217,113.69

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Solution

The fourth proportional to 398,401.71, 549,794.46 and 217,113.69 is: 299,616.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,401.71 : 549,794.46 = 217,113.69 : x
  2. Step 2: Convert to fraction form
    398,401.71/549,794.46 = 217,113.69/x
  3. Step 3: Cross multiply
    398,401.71x = 549,794.46 × 217,113.69
  4. Step 4: Simplify right side
    398,401.71x = 119,367,903,952.16
  5. Step 5: Solve for x
    x = 119,367,903,952.16/398,401.71
  6. Step 6: Final answer
    x = 299,616.95

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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.