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Finding the Fourth Proportional to 389,488.32, 537,491.90 and 217,396.44

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Solution

The fourth proportional to 389,488.32, 537,491.90 and 217,396.44 is: 300,005.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,488.32 : 537,491.90 = 217,396.44 : x
  2. Step 2: Convert to fraction form
    389,488.32/537,491.90 = 217,396.44/x
  3. Step 3: Cross multiply
    389,488.32x = 537,491.90 × 217,396.44
  4. Step 4: Simplify right side
    389,488.32x = 116,848,825,588.84
  5. Step 5: Solve for x
    x = 116,848,825,588.84/389,488.32
  6. Step 6: Final answer
    x = 300,005.98

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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.