Home / 389,320.20-583,980.30-139,969.80

Finding the Fourth Proportional to 389,320.20, 583,980.30 and 139,969.80

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Solution

The fourth proportional to 389,320.20, 583,980.30 and 139,969.80 is: 209,954.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,320.20 : 583,980.30 = 139,969.80 : x
  2. Step 2: Convert to fraction form
    389,320.20/583,980.30 = 139,969.80/x
  3. Step 3: Cross multiply
    389,320.20x = 583,980.30 × 139,969.80
  4. Step 4: Simplify right side
    389,320.20x = 81,739,605,794.94
  5. Step 5: Solve for x
    x = 81,739,605,794.94/389,320.20
  6. Step 6: Final answer
    x = 209,954.70

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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.