Home / 714,429.11-985,908.71-392,144.69

Finding the Fourth Proportional to 714,429.11, 985,908.71 and 392,144.69

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Solution

The fourth proportional to 714,429.11, 985,908.71 and 392,144.69 is: 541,157.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,429.11 : 985,908.71 = 392,144.69 : x
  2. Step 2: Convert to fraction form
    714,429.11/985,908.71 = 392,144.69/x
  3. Step 3: Cross multiply
    714,429.11x = 985,908.71 × 392,144.69
  4. Step 4: Simplify right side
    714,429.11x = 386,618,868,896.38
  5. Step 5: Solve for x
    x = 386,618,868,896.38/714,429.11
  6. Step 6: Final answer
    x = 541,157.77

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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.