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Finding the Fourth Proportional to 514.76, 710.70 and 459.40

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Solution

The fourth proportional to 514.76, 710.70 and 459.40 is: 634.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    514.76 : 710.70 = 459.40 : x
  2. Step 2: Convert to fraction form
    514.76/710.70 = 459.40/x
  3. Step 3: Cross multiply
    514.76x = 710.70 × 459.40
  4. Step 4: Simplify right side
    514.76x = 326,497.36
  5. Step 5: Solve for x
    x = 326,497.36/514.76
  6. Step 6: Final answer
    x = 634.27

Related Problems

Find fourth proportional to 257.38, 355.35 and 229.70
Half scale
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Double scale
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Similar ratio
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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.