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Finding the Fourth Proportional to 663,912.66, 993,931.30 and 493,888.53

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Solution

The fourth proportional to 663,912.66, 993,931.30 and 493,888.53 is: 739,391.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,912.66 : 993,931.30 = 493,888.53 : x
  2. Step 2: Convert to fraction form
    663,912.66/993,931.30 = 493,888.53/x
  3. Step 3: Cross multiply
    663,912.66x = 993,931.30 × 493,888.53
  4. Step 4: Simplify right side
    663,912.66x = 490,891,268,677.99
  5. Step 5: Solve for x
    x = 490,891,268,677.99/663,912.66
  6. Step 6: Final answer
    x = 739,391.34

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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.