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Finding the Fourth Proportional to 343,607.30, 515,287.45 and 118,906.72

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Solution

The fourth proportional to 343,607.30, 515,287.45 and 118,906.72 is: 178,317.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,607.30 : 515,287.45 = 118,906.72 : x
  2. Step 2: Convert to fraction form
    343,607.30/515,287.45 = 118,906.72/x
  3. Step 3: Cross multiply
    343,607.30x = 515,287.45 × 118,906.72
  4. Step 4: Simplify right side
    343,607.30x = 61,271,140,536.66
  5. Step 5: Solve for x
    x = 61,271,140,536.66/343,607.30
  6. Step 6: Final answer
    x = 178,317.34

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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.