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Finding the Fourth Proportional to 398,711.68, 550,217.76 and 217,423.04

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Solution

The fourth proportional to 398,711.68, 550,217.76 and 217,423.04 is: 300,041.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,711.68 : 550,217.76 = 217,423.04 : x
  2. Step 2: Convert to fraction form
    398,711.68/550,217.76 = 217,423.04/x
  3. Step 3: Cross multiply
    398,711.68x = 550,217.76 × 217,423.04
  4. Step 4: Simplify right side
    398,711.68x = 119,630,018,041.19
  5. Step 5: Solve for x
    x = 119,630,018,041.19/398,711.68
  6. Step 6: Final answer
    x = 300,041.42

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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.