Home / 389,929.20-584,490.60-212,060.40

Finding the Fourth Proportional to 389,929.20, 584,490.60 and 212,060.40

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Solution

The fourth proportional to 389,929.20, 584,490.60 and 212,060.40 is: 317,871.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,929.20 : 584,490.60 = 212,060.40 : x
  2. Step 2: Convert to fraction form
    389,929.20/584,490.60 = 212,060.40/x
  3. Step 3: Cross multiply
    389,929.20x = 584,490.60 × 212,060.40
  4. Step 4: Simplify right side
    389,929.20x = 123,947,310,432.24
  5. Step 5: Solve for x
    x = 123,947,310,432.24/389,929.20
  6. Step 6: Final answer
    x = 317,871.32

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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.