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Finding the Fourth Proportional to 343,386.60, 515,079.90 and 238,410.60

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Solution

The fourth proportional to 343,386.60, 515,079.90 and 238,410.60 is: 357,615.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,386.60 : 515,079.90 = 238,410.60 : x
  2. Step 2: Convert to fraction form
    343,386.60/515,079.90 = 238,410.60/x
  3. Step 3: Cross multiply
    343,386.60x = 515,079.90 × 238,410.60
  4. Step 4: Simplify right side
    343,386.60x = 122,800,508,006.94
  5. Step 5: Solve for x
    x = 122,800,508,006.94/343,386.60
  6. Step 6: Final answer
    x = 357,615.90

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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.