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Finding the Fourth Proportional to 389,920.80, 583,498.80 and 265,504.80

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Solution

The fourth proportional to 389,920.80, 583,498.80 and 265,504.80 is: 397,315.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,920.80 : 583,498.80 = 265,504.80 : x
  2. Step 2: Convert to fraction form
    389,920.80/583,498.80 = 265,504.80/x
  3. Step 3: Cross multiply
    389,920.80x = 583,498.80 × 265,504.80
  4. Step 4: Simplify right side
    389,920.80x = 154,921,732,194.24
  5. Step 5: Solve for x
    x = 154,921,732,194.24/389,920.80
  6. Step 6: Final answer
    x = 397,315.90

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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.