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Finding the Fourth Proportional to 662,478.91, 993,697.16 and 278,431.22

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Solution

The fourth proportional to 662,478.91, 993,697.16 and 278,431.22 is: 417,637.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,478.91 : 993,697.16 = 278,431.22 : x
  2. Step 2: Convert to fraction form
    662,478.91/993,697.16 = 278,431.22/x
  3. Step 3: Cross multiply
    662,478.91x = 993,697.16 × 278,431.22
  4. Step 4: Simplify right side
    662,478.91x = 276,676,313,661.42
  5. Step 5: Solve for x
    x = 276,676,313,661.42/662,478.91
  6. Step 6: Final answer
    x = 417,637.92

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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.