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Finding the Fourth Proportional to 343,886.40, 515,829.60 and 203,572.80

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Solution

The fourth proportional to 343,886.40, 515,829.60 and 203,572.80 is: 305,359.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,886.40 : 515,829.60 = 203,572.80 : x
  2. Step 2: Convert to fraction form
    343,886.40/515,829.60 = 203,572.80/x
  3. Step 3: Cross multiply
    343,886.40x = 515,829.60 × 203,572.80
  4. Step 4: Simplify right side
    343,886.40x = 105,008,875,994.88
  5. Step 5: Solve for x
    x = 105,008,875,994.88/343,886.40
  6. Step 6: Final answer
    x = 305,359.20

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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.