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Finding the Fourth Proportional to 386,031.84, 579,019.86 and 119,785.56

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Solution

The fourth proportional to 386,031.84, 579,019.86 and 119,785.56 is: 179,669.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,031.84 : 579,019.86 = 119,785.56 : x
  2. Step 2: Convert to fraction form
    386,031.84/579,019.86 = 119,785.56/x
  3. Step 3: Cross multiply
    386,031.84x = 579,019.86 × 119,785.56
  4. Step 4: Simplify right side
    386,031.84x = 69,358,218,181.22
  5. Step 5: Solve for x
    x = 69,358,218,181.22/386,031.84
  6. Step 6: Final answer
    x = 179,669.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.