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Finding the Fourth Proportional to 662,478.99, 993,697.29 and 278,431.31

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Solution

The fourth proportional to 662,478.99, 993,697.29 and 278,431.31 is: 417,638.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,478.99 : 993,697.29 = 278,431.31 : x
  2. Step 2: Convert to fraction form
    662,478.99/993,697.29 = 278,431.31/x
  3. Step 3: Cross multiply
    662,478.99x = 993,697.29 × 278,431.31
  4. Step 4: Simplify right side
    662,478.99x = 276,676,433,229.66
  5. Step 5: Solve for x
    x = 276,676,433,229.66/662,478.99
  6. Step 6: Final answer
    x = 417,638.05

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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.