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Finding the Fourth Proportional to 389,521.67, 584,347.10 and 136,736.60

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Solution

The fourth proportional to 389,521.67, 584,347.10 and 136,736.60 is: 205,127.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,521.67 : 584,347.10 = 136,736.60 : x
  2. Step 2: Convert to fraction form
    389,521.67/584,347.10 = 136,736.60/x
  3. Step 3: Cross multiply
    389,521.67x = 584,347.10 × 136,736.60
  4. Step 4: Simplify right side
    389,521.67x = 79,901,632,068.44
  5. Step 5: Solve for x
    x = 79,901,632,068.44/389,521.67
  6. Step 6: Final answer
    x = 205,127.57

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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.