Home / 389,932.20-584,495.10-212,063.40

Finding the Fourth Proportional to 389,932.20, 584,495.10 and 212,063.40

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Solution

The fourth proportional to 389,932.20, 584,495.10 and 212,063.40 is: 317,875.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,932.20 : 584,495.10 = 212,063.40 : x
  2. Step 2: Convert to fraction form
    389,932.20/584,495.10 = 212,063.40/x
  3. Step 3: Cross multiply
    389,932.20x = 584,495.10 × 212,063.40
  4. Step 4: Simplify right side
    389,932.20x = 123,950,018,189.34
  5. Step 5: Solve for x
    x = 123,950,018,189.34/389,932.20
  6. Step 6: Final answer
    x = 317,875.82

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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.