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Finding the Fourth Proportional to 1,304.21, 1,799.80 and 714.75

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Solution

The fourth proportional to 1,304.21, 1,799.80 and 714.75 is: 986.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,304.21 : 1,799.80 = 714.75 : x
  2. Step 2: Convert to fraction form
    1,304.21/1,799.80 = 714.75/x
  3. Step 3: Cross multiply
    1,304.21x = 1,799.80 × 714.75
  4. Step 4: Simplify right side
    1,304.21x = 1,286,402.53
  5. Step 5: Solve for x
    x = 1,286,402.53/1,304.21
  6. Step 6: Final answer
    x = 986.34

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Half scale
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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.