Home / 686,131.71-946,834.56-380,221.04

Finding the Fourth Proportional to 686,131.71, 946,834.56 and 380,221.04

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Solution

The fourth proportional to 686,131.71, 946,834.56 and 380,221.04 is: 524,689.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,131.71 : 946,834.56 = 380,221.04 : x
  2. Step 2: Convert to fraction form
    686,131.71/946,834.56 = 380,221.04/x
  3. Step 3: Cross multiply
    686,131.71x = 946,834.56 × 380,221.04
  4. Step 4: Simplify right side
    686,131.71x = 360,006,416,376.97
  5. Step 5: Solve for x
    x = 360,006,416,376.97/686,131.71
  6. Step 6: Final answer
    x = 524,689.96

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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.