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Finding the Fourth Proportional to 665,996.72, 998,531.64 and 286,803.74

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Solution

The fourth proportional to 665,996.72, 998,531.64 and 286,803.74 is: 430,006.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,996.72 : 998,531.64 = 286,803.74 : x
  2. Step 2: Convert to fraction form
    665,996.72/998,531.64 = 286,803.74/x
  3. Step 3: Cross multiply
    665,996.72x = 998,531.64 × 286,803.74
  4. Step 4: Simplify right side
    665,996.72x = 286,382,608,860.33
  5. Step 5: Solve for x
    x = 286,382,608,860.33/665,996.72
  6. Step 6: Final answer
    x = 430,006.03

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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.