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Finding the Fourth Proportional to 398,358.87, 549,737.30 and 217,072.79

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Solution

The fourth proportional to 398,358.87, 549,737.30 and 217,072.79 is: 299,561.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,358.87 : 549,737.30 = 217,072.79 : x
  2. Step 2: Convert to fraction form
    398,358.87/549,737.30 = 217,072.79/x
  3. Step 3: Cross multiply
    398,358.87x = 549,737.30 × 217,072.79
  4. Step 4: Simplify right side
    398,358.87x = 119,333,008,392.70
  5. Step 5: Solve for x
    x = 119,333,008,392.70/398,358.87
  6. Step 6: Final answer
    x = 299,561.57

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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.