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Finding the Fourth Proportional to 343,605.42, 515,281.77 and 118,908.18

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Solution

The fourth proportional to 343,605.42, 515,281.77 and 118,908.18 is: 178,318.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,605.42 : 515,281.77 = 118,908.18 : x
  2. Step 2: Convert to fraction form
    343,605.42/515,281.77 = 118,908.18/x
  3. Step 3: Cross multiply
    343,605.42x = 515,281.77 × 118,908.18
  4. Step 4: Simplify right side
    343,605.42x = 61,271,217,457.88
  5. Step 5: Solve for x
    x = 61,271,217,457.88/343,605.42
  6. Step 6: Final answer
    x = 178,318.54

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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.