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Finding the Fourth Proportional to 389,101.98, 579,785 and 346,655.94

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Solution

The fourth proportional to 389,101.98, 579,785 and 346,655.94 is: 516,537.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,101.98 : 579,785 = 346,655.94 : x
  2. Step 2: Convert to fraction form
    389,101.98/579,785 = 346,655.94/x
  3. Step 3: Cross multiply
    389,101.98x = 579,785 × 346,655.94
  4. Step 4: Simplify right side
    389,101.98x = 200,985,914,172.90
  5. Step 5: Solve for x
    x = 200,985,914,172.90/389,101.98
  6. Step 6: Final answer
    x = 516,537.89

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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.