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Finding the Fourth Proportional to 343,406.60, 515,109.90 and 217,435.40

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Solution

The fourth proportional to 343,406.60, 515,109.90 and 217,435.40 is: 326,153.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,406.60 : 515,109.90 = 217,435.40 : x
  2. Step 2: Convert to fraction form
    343,406.60/515,109.90 = 217,435.40/x
  3. Step 3: Cross multiply
    343,406.60x = 515,109.90 × 217,435.40
  4. Step 4: Simplify right side
    343,406.60x = 112,003,127,150.46
  5. Step 5: Solve for x
    x = 112,003,127,150.46/343,406.60
  6. Step 6: Final answer
    x = 326,153.10

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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.