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Finding the Fourth Proportional to 389,959.20, 584,938.80 and 355,552.80

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Solution

The fourth proportional to 389,959.20, 584,938.80 and 355,552.80 is: 533,329.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,959.20 : 584,938.80 = 355,552.80 : x
  2. Step 2: Convert to fraction form
    389,959.20/584,938.80 = 355,552.80/x
  3. Step 3: Cross multiply
    389,959.20x = 584,938.80 × 355,552.80
  4. Step 4: Simplify right side
    389,959.20x = 207,976,628,168.64
  5. Step 5: Solve for x
    x = 207,976,628,168.64/389,959.20
  6. Step 6: Final answer
    x = 533,329.20

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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.