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Finding the Fourth Proportional to 666,317.18, 999,918.30 and 311,358.62

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Solution

The fourth proportional to 666,317.18, 999,918.30 and 311,358.62 is: 467,244.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,317.18 : 999,918.30 = 311,358.62 : x
  2. Step 2: Convert to fraction form
    666,317.18/999,918.30 = 311,358.62/x
  3. Step 3: Cross multiply
    666,317.18x = 999,918.30 × 311,358.62
  4. Step 4: Simplify right side
    666,317.18x = 311,333,182,000.75
  5. Step 5: Solve for x
    x = 311,333,182,000.75/666,317.18
  6. Step 6: Final answer
    x = 467,244.72

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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.