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Finding the Fourth Proportional to 626.77, 865.01 and 521.67

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Solution

The fourth proportional to 626.77, 865.01 and 521.67 is: 719.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.77 : 865.01 = 521.67 : x
  2. Step 2: Convert to fraction form
    626.77/865.01 = 521.67/x
  3. Step 3: Cross multiply
    626.77x = 865.01 × 521.67
  4. Step 4: Simplify right side
    626.77x = 451,251.07
  5. Step 5: Solve for x
    x = 451,251.07/626.77
  6. Step 6: Final answer
    x = 719.97

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Find fourth proportional to 313.38, 432.51 and 260.84
Half scale
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Double scale
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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.