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Finding the Fourth Proportional to 514.75, 710.36 and 281.88

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Solution

The fourth proportional to 514.75, 710.36 and 281.88 is: 389.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    514.75 : 710.36 = 281.88 : x
  2. Step 2: Convert to fraction form
    514.75/710.36 = 281.88/x
  3. Step 3: Cross multiply
    514.75x = 710.36 × 281.88
  4. Step 4: Simplify right side
    514.75x = 200,236.28
  5. Step 5: Solve for x
    x = 200,236.28/514.75
  6. Step 6: Final answer
    x = 389.00

Related Problems

Find fourth proportional to 257.38, 355.18 and 140.94
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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.