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Finding the Fourth Proportional to 910.51, 1,363.70 and 637.81

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Solution

The fourth proportional to 910.51, 1,363.70 and 637.81 is: 955.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.51 : 1,363.70 = 637.81 : x
  2. Step 2: Convert to fraction form
    910.51/1,363.70 = 637.81/x
  3. Step 3: Cross multiply
    910.51x = 1,363.70 × 637.81
  4. Step 4: Simplify right side
    910.51x = 869,789.66
  5. Step 5: Solve for x
    x = 869,789.66/910.51
  6. Step 6: Final answer
    x = 955.28

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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.