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Finding the Fourth Proportional to 666,493.80, 999,740.70 and 427,345.35

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Solution

The fourth proportional to 666,493.80, 999,740.70 and 427,345.35 is: 641,018.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,493.80 : 999,740.70 = 427,345.35 : x
  2. Step 2: Convert to fraction form
    666,493.80/999,740.70 = 427,345.35/x
  3. Step 3: Cross multiply
    666,493.80x = 999,740.70 × 427,345.35
  4. Step 4: Simplify right side
    666,493.80x = 427,234,539,350.75
  5. Step 5: Solve for x
    x = 427,234,539,350.75/666,493.80
  6. Step 6: Final answer
    x = 641,018.03

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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.