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Finding the Fourth Proportional to 666,822.96, 999,807.84 and 287,990.64

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Solution

The fourth proportional to 666,822.96, 999,807.84 and 287,990.64 is: 431,801.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,822.96 : 999,807.84 = 287,990.64 : x
  2. Step 2: Convert to fraction form
    666,822.96/999,807.84 = 287,990.64/x
  3. Step 3: Cross multiply
    666,822.96x = 999,807.84 × 287,990.64
  4. Step 4: Simplify right side
    666,822.96x = 287,935,299,718.62
  5. Step 5: Solve for x
    x = 287,935,299,718.62/666,822.96
  6. Step 6: Final answer
    x = 431,801.72

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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.