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Finding the Fourth Proportional to 685.04, 945.35 and 423.00

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Solution

The fourth proportional to 685.04, 945.35 and 423.00 is: 583.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    685.04 : 945.35 = 423.00 : x
  2. Step 2: Convert to fraction form
    685.04/945.35 = 423.00/x
  3. Step 3: Cross multiply
    685.04x = 945.35 × 423.00
  4. Step 4: Simplify right side
    685.04x = 399,883.30
  5. Step 5: Solve for x
    x = 399,883.30/685.04
  6. Step 6: Final answer
    x = 583.74

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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.