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Finding the Fourth Proportional to 637.04, 955.56 and 420.57

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Solution

The fourth proportional to 637.04, 955.56 and 420.57 is: 630.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.04 : 955.56 = 420.57 : x
  2. Step 2: Convert to fraction form
    637.04/955.56 = 420.57/x
  3. Step 3: Cross multiply
    637.04x = 955.56 × 420.57
  4. Step 4: Simplify right side
    637.04x = 401,881.45
  5. Step 5: Solve for x
    x = 401,881.45/637.04
  6. Step 6: Final answer
    x = 630.86

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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.