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Finding the Fourth Proportional to 714.69, 987.01 and 637.34

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Solution

The fourth proportional to 714.69, 987.01 and 637.34 is: 880.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.69 : 987.01 = 637.34 : x
  2. Step 2: Convert to fraction form
    714.69/987.01 = 637.34/x
  3. Step 3: Cross multiply
    714.69x = 987.01 × 637.34
  4. Step 4: Simplify right side
    714.69x = 629,054.43
  5. Step 5: Solve for x
    x = 629,054.43/714.69
  6. Step 6: Final answer
    x = 880.18

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Double scale
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1.5x scale

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.