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Finding the Fourth Proportional to 1,363.83, 2,046.05 and 390.00

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Solution

The fourth proportional to 1,363.83, 2,046.05 and 390.00 is: 585.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,363.83 : 2,046.05 = 390.00 : x
  2. Step 2: Convert to fraction form
    1,363.83/2,046.05 = 390.00/x
  3. Step 3: Cross multiply
    1,363.83x = 2,046.05 × 390.00
  4. Step 4: Simplify right side
    1,363.83x = 797,966.69
  5. Step 5: Solve for x
    x = 797,966.69/1,363.83
  6. Step 6: Final answer
    x = 585.09

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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.