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Finding the Fourth Proportional to 347,320.80, 520,981.20 and 207,352.80

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Solution

The fourth proportional to 347,320.80, 520,981.20 and 207,352.80 is: 311,029.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,320.80 : 520,981.20 = 207,352.80 : x
  2. Step 2: Convert to fraction form
    347,320.80/520,981.20 = 207,352.80/x
  3. Step 3: Cross multiply
    347,320.80x = 520,981.20 × 207,352.80
  4. Step 4: Simplify right side
    347,320.80x = 108,026,910,567.36
  5. Step 5: Solve for x
    x = 108,026,910,567.36/347,320.80
  6. Step 6: Final answer
    x = 311,029.20

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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.