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Finding the Fourth Proportional to 343,930.20, 515,117.70 and 203,962.20

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Solution

The fourth proportional to 343,930.20, 515,117.70 and 203,962.20 is: 305,482.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,930.20 : 515,117.70 = 203,962.20 : x
  2. Step 2: Convert to fraction form
    343,930.20/515,117.70 = 203,962.20/x
  3. Step 3: Cross multiply
    343,930.20x = 515,117.70 × 203,962.20
  4. Step 4: Simplify right side
    343,930.20x = 105,064,539,350.94
  5. Step 5: Solve for x
    x = 105,064,539,350.94/343,930.20
  6. Step 6: Final answer
    x = 305,482.16

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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.