Home / 686,132.46-946,835.60-380,221.79

Finding the Fourth Proportional to 686,132.46, 946,835.60 and 380,221.79

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Solution

The fourth proportional to 686,132.46, 946,835.60 and 380,221.79 is: 524,690.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,132.46 : 946,835.60 = 380,221.79 : x
  2. Step 2: Convert to fraction form
    686,132.46/946,835.60 = 380,221.79/x
  3. Step 3: Cross multiply
    686,132.46x = 946,835.60 × 380,221.79
  4. Step 4: Simplify right side
    686,132.46x = 360,007,520,032.44
  5. Step 5: Solve for x
    x = 360,007,520,032.44/686,132.46
  6. Step 6: Final answer
    x = 524,690.99

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Double scale
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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.