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Finding the Fourth Proportional to 665,862.18, 999,045.03 and 399,807.78

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Solution

The fourth proportional to 665,862.18, 999,045.03 and 399,807.78 is: 599,862.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,862.18 : 999,045.03 = 399,807.78 : x
  2. Step 2: Convert to fraction form
    665,862.18/999,045.03 = 399,807.78/x
  3. Step 3: Cross multiply
    665,862.18x = 999,045.03 × 399,807.78
  4. Step 4: Simplify right side
    665,862.18x = 399,425,975,564.33
  5. Step 5: Solve for x
    x = 399,425,975,564.33/665,862.18
  6. Step 6: Final answer
    x = 599,862.84

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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.