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Finding the Fourth Proportional to 389,415.85, 537,394.37 and 217,333.81

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Solution

The fourth proportional to 389,415.85, 537,394.37 and 217,333.81 is: 299,920.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,415.85 : 537,394.37 = 217,333.81 : x
  2. Step 2: Convert to fraction form
    389,415.85/537,394.37 = 217,333.81/x
  3. Step 3: Cross multiply
    389,415.85x = 537,394.37 × 217,333.81
  4. Step 4: Simplify right side
    389,415.85x = 116,793,965,812.06
  5. Step 5: Solve for x
    x = 116,793,965,812.06/389,415.85
  6. Step 6: Final answer
    x = 299,920.93

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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.