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Finding the Fourth Proportional to 663.51, 988.60 and 626.25

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Solution

The fourth proportional to 663.51, 988.60 and 626.25 is: 933.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.51 : 988.60 = 626.25 : x
  2. Step 2: Convert to fraction form
    663.51/988.60 = 626.25/x
  3. Step 3: Cross multiply
    663.51x = 988.60 × 626.25
  4. Step 4: Simplify right side
    663.51x = 619,109.18
  5. Step 5: Solve for x
    x = 619,109.18/663.51
  6. Step 6: Final answer
    x = 933.08

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.