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Finding the Fourth Proportional to 386,078.70, 579,031.65 and 253,886.70

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Solution

The fourth proportional to 386,078.70, 579,031.65 and 253,886.70 is: 380,773.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,078.70 : 579,031.65 = 253,886.70 : x
  2. Step 2: Convert to fraction form
    386,078.70/579,031.65 = 253,886.70/x
  3. Step 3: Cross multiply
    386,078.70x = 579,031.65 × 253,886.70
  4. Step 4: Simplify right side
    386,078.70x = 147,008,434,814.06
  5. Step 5: Solve for x
    x = 147,008,434,814.06/386,078.70
  6. Step 6: Final answer
    x = 380,773.23

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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.