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Finding the Fourth Proportional to 510.02, 764.62 and 221.25

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Solution

The fourth proportional to 510.02, 764.62 and 221.25 is: 331.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.02 : 764.62 = 221.25 : x
  2. Step 2: Convert to fraction form
    510.02/764.62 = 221.25/x
  3. Step 3: Cross multiply
    510.02x = 764.62 × 221.25
  4. Step 4: Simplify right side
    510.02x = 169,171.62
  5. Step 5: Solve for x
    x = 169,171.62/510.02
  6. Step 6: Final answer
    x = 331.70

Related Problems

Find fourth proportional to 255.01, 382.31 and 110.63
Half scale
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Double scale
Find fourth proportional to 511.02, 766.12 and 222.25
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.