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Finding the Fourth Proportional to 630.01, 869.55 and 394.00

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Solution

The fourth proportional to 630.01, 869.55 and 394.00 is: 543.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.01 : 869.55 = 394.00 : x
  2. Step 2: Convert to fraction form
    630.01/869.55 = 394.00/x
  3. Step 3: Cross multiply
    630.01x = 869.55 × 394.00
  4. Step 4: Simplify right side
    630.01x = 342,601.26
  5. Step 5: Solve for x
    x = 342,601.26/630.01
  6. Step 6: Final answer
    x = 543.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.