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Finding the Fourth Proportional to 355,686.80, 533,530.20 and 343,245.20

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Solution

The fourth proportional to 355,686.80, 533,530.20 and 343,245.20 is: 514,867.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,686.80 : 533,530.20 = 343,245.20 : x
  2. Step 2: Convert to fraction form
    355,686.80/533,530.20 = 343,245.20/x
  3. Step 3: Cross multiply
    355,686.80x = 533,530.20 × 343,245.20
  4. Step 4: Simplify right side
    355,686.80x = 183,131,680,205.04
  5. Step 5: Solve for x
    x = 183,131,680,205.04/355,686.80
  6. Step 6: Final answer
    x = 514,867.80

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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.