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Finding the Fourth Proportional to 810.37, 1,215.25 and 637.37

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Solution

The fourth proportional to 810.37, 1,215.25 and 637.37 is: 955.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    810.37 : 1,215.25 = 637.37 : x
  2. Step 2: Convert to fraction form
    810.37/1,215.25 = 637.37/x
  3. Step 3: Cross multiply
    810.37x = 1,215.25 × 637.37
  4. Step 4: Simplify right side
    810.37x = 774,565.34
  5. Step 5: Solve for x
    x = 774,565.34/810.37
  6. Step 6: Final answer
    x = 955.82

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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.