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Finding the Fourth Proportional to 662,479.49, 993,698.04 and 278,431.81

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Solution

The fourth proportional to 662,479.49, 993,698.04 and 278,431.81 is: 417,638.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,479.49 : 993,698.04 = 278,431.81 : x
  2. Step 2: Convert to fraction form
    662,479.49/993,698.04 = 278,431.81/x
  3. Step 3: Cross multiply
    662,479.49x = 993,698.04 × 278,431.81
  4. Step 4: Simplify right side
    662,479.49x = 276,677,143,870.65
  5. Step 5: Solve for x
    x = 276,677,143,870.65/662,479.49
  6. Step 6: Final answer
    x = 417,638.81

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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.