Home / 389,129.28-583,722.72-139,813.44

Finding the Fourth Proportional to 389,129.28, 583,722.72 and 139,813.44

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Solution

The fourth proportional to 389,129.28, 583,722.72 and 139,813.44 is: 209,730.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,129.28 : 583,722.72 = 139,813.44 : x
  2. Step 2: Convert to fraction form
    389,129.28/583,722.72 = 139,813.44/x
  3. Step 3: Cross multiply
    389,129.28x = 583,722.72 × 139,813.44
  4. Step 4: Simplify right side
    389,129.28x = 81,612,281,489.36
  5. Step 5: Solve for x
    x = 81,612,281,489.36/389,129.28
  6. Step 6: Final answer
    x = 209,730.51

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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.