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Finding the Fourth Proportional to 414,763.13, 621,510.90 and 279,326.40

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Solution

The fourth proportional to 414,763.13, 621,510.90 and 279,326.40 is: 418,562.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    414,763.13 : 621,510.90 = 279,326.40 : x
  2. Step 2: Convert to fraction form
    414,763.13/621,510.90 = 279,326.40/x
  3. Step 3: Cross multiply
    414,763.13x = 621,510.90 × 279,326.40
  4. Step 4: Simplify right side
    414,763.13x = 173,604,402,257.76
  5. Step 5: Solve for x
    x = 173,604,402,257.76/414,763.13
  6. Step 6: Final answer
    x = 418,562.77

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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.