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Finding the Fourth Proportional to 1,864.66, 2,797.08 and 478

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Solution

The fourth proportional to 1,864.66, 2,797.08 and 478 is: 717.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,864.66 : 2,797.08 = 478 : x
  2. Step 2: Convert to fraction form
    1,864.66/2,797.08 = 478/x
  3. Step 3: Cross multiply
    1,864.66x = 2,797.08 × 478
  4. Step 4: Simplify right side
    1,864.66x = 1,337,004.24
  5. Step 5: Solve for x
    x = 1,337,004.24/1,864.66
  6. Step 6: Final answer
    x = 717.02

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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.