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Finding the Fourth Proportional to 962.77, 1,328.62 and 520.68

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Solution

The fourth proportional to 962.77, 1,328.62 and 520.68 is: 718.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    962.77 : 1,328.62 = 520.68 : x
  2. Step 2: Convert to fraction form
    962.77/1,328.62 = 520.68/x
  3. Step 3: Cross multiply
    962.77x = 1,328.62 × 520.68
  4. Step 4: Simplify right side
    962.77x = 691,783.05
  5. Step 5: Solve for x
    x = 691,783.05/962.77
  6. Step 6: Final answer
    x = 718.53

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Find fourth proportional to 481.38, 664.31 and 260.34
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.