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Finding the Fourth Proportional to 389,559.74, 584,372.91 and 136,818.21

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Solution

The fourth proportional to 389,559.74, 584,372.91 and 136,818.21 is: 205,239.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,559.74 : 584,372.91 = 136,818.21 : x
  2. Step 2: Convert to fraction form
    389,559.74/584,372.91 = 136,818.21/x
  3. Step 3: Cross multiply
    389,559.74x = 584,372.91 × 136,818.21
  4. Step 4: Simplify right side
    389,559.74x = 79,952,855,518.69
  5. Step 5: Solve for x
    x = 79,952,855,518.69/389,559.74
  6. Step 6: Final answer
    x = 205,239.01

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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.