Home / 389,711.40-537,747.78-217,608.36

Finding the Fourth Proportional to 389,711.40, 537,747.78 and 217,608.36

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Solution

The fourth proportional to 389,711.40, 537,747.78 and 217,608.36 is: 300,269.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,711.40 : 537,747.78 = 217,608.36 : x
  2. Step 2: Convert to fraction form
    389,711.40/537,747.78 = 217,608.36/x
  3. Step 3: Cross multiply
    389,711.40x = 537,747.78 × 217,608.36
  4. Step 4: Simplify right side
    389,711.40x = 117,018,412,499.44
  5. Step 5: Solve for x
    x = 117,018,412,499.44/389,711.40
  6. Step 6: Final answer
    x = 300,269.41

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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.