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Finding the Fourth Proportional to 414,765.13, 621,513.90 and 279,328.40

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Solution

The fourth proportional to 414,765.13, 621,513.90 and 279,328.40 is: 418,565.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    414,765.13 : 621,513.90 = 279,328.40 : x
  2. Step 2: Convert to fraction form
    414,765.13/621,513.90 = 279,328.40/x
  3. Step 3: Cross multiply
    414,765.13x = 621,513.90 × 279,328.40
  4. Step 4: Simplify right side
    414,765.13x = 173,606,483,264.76
  5. Step 5: Solve for x
    x = 173,606,483,264.76/414,765.13
  6. Step 6: Final answer
    x = 418,565.76

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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.