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Finding the Fourth Proportional to 343,338.48, 515,030.36 and 118,720.64

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Solution

The fourth proportional to 343,338.48, 515,030.36 and 118,720.64 is: 178,088.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,338.48 : 515,030.36 = 118,720.64 : x
  2. Step 2: Convert to fraction form
    343,338.48/515,030.36 = 118,720.64/x
  3. Step 3: Cross multiply
    343,338.48x = 515,030.36 × 118,720.64
  4. Step 4: Simplify right side
    343,338.48x = 61,144,733,958.63
  5. Step 5: Solve for x
    x = 61,144,733,958.63/343,338.48
  6. Step 6: Final answer
    x = 178,088.79

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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.