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Finding the Fourth Proportional to 521.94, 725.11 and 517.18

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Solution

The fourth proportional to 521.94, 725.11 and 517.18 is: 718.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.94 : 725.11 = 517.18 : x
  2. Step 2: Convert to fraction form
    521.94/725.11 = 517.18/x
  3. Step 3: Cross multiply
    521.94x = 725.11 × 517.18
  4. Step 4: Simplify right side
    521.94x = 375,012.39
  5. Step 5: Solve for x
    x = 375,012.39/521.94
  6. Step 6: Final answer
    x = 718.50

Related Problems

Find fourth proportional to 260.97, 362.56 and 258.59
Half scale
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Double scale
Find fourth proportional to 522.94, 726.50 and 518.18
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.