Home / 678,078.27-935,679.86-406,139.18

Finding the Fourth Proportional to 678,078.27, 935,679.86 and 406,139.18

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Solution

The fourth proportional to 678,078.27, 935,679.86 and 406,139.18 is: 560,431.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,078.27 : 935,679.86 = 406,139.18 : x
  2. Step 2: Convert to fraction form
    678,078.27/935,679.86 = 406,139.18/x
  3. Step 3: Cross multiply
    678,078.27x = 935,679.86 × 406,139.18
  4. Step 4: Simplify right side
    678,078.27x = 380,016,251,082.92
  5. Step 5: Solve for x
    x = 380,016,251,082.92/678,078.27
  6. Step 6: Final answer
    x = 560,431.25

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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.