Home / 389,631.80-584,481.02-136,890.34

Finding the Fourth Proportional to 389,631.80, 584,481.02 and 136,890.34

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Solution

The fourth proportional to 389,631.80, 584,481.02 and 136,890.34 is: 205,347.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,631.80 : 584,481.02 = 136,890.34 : x
  2. Step 2: Convert to fraction form
    389,631.80/584,481.02 = 136,890.34/x
  3. Step 3: Cross multiply
    389,631.80x = 584,481.02 × 136,890.34
  4. Step 4: Simplify right side
    389,631.80x = 80,009,803,405.69
  5. Step 5: Solve for x
    x = 80,009,803,405.69/389,631.80
  6. Step 6: Final answer
    x = 205,347.21

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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.