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Finding the Fourth Proportional to 389,154.88, 579,863.64 and 346,708.72

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Solution

The fourth proportional to 389,154.88, 579,863.64 and 346,708.72 is: 516,616.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,154.88 : 579,863.64 = 346,708.72 : x
  2. Step 2: Convert to fraction form
    389,154.88/579,863.64 = 346,708.72/x
  3. Step 3: Cross multiply
    389,154.88x = 579,863.64 × 346,708.72
  4. Step 4: Simplify right side
    389,154.88x = 201,043,780,398.94
  5. Step 5: Solve for x
    x = 201,043,780,398.94/389,154.88
  6. Step 6: Final answer
    x = 516,616.37

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.