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Finding the Fourth Proportional to 666,662.18, 999,193.80 and 342,116.51

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Solution

The fourth proportional to 666,662.18, 999,193.80 and 342,116.51 is: 512,764.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,662.18 : 999,193.80 = 342,116.51 : x
  2. Step 2: Convert to fraction form
    666,662.18/999,193.80 = 342,116.51/x
  3. Step 3: Cross multiply
    666,662.18x = 999,193.80 × 342,116.51
  4. Step 4: Simplify right side
    666,662.18x = 341,840,690,673.67
  5. Step 5: Solve for x
    x = 341,840,690,673.67/666,662.18
  6. Step 6: Final answer
    x = 512,764.49

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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.