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Finding the Fourth Proportional to 514.78, 710.39 and 293.72

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Solution

The fourth proportional to 514.78, 710.39 and 293.72 is: 405.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    514.78 : 710.39 = 293.72 : x
  2. Step 2: Convert to fraction form
    514.78/710.39 = 293.72/x
  3. Step 3: Cross multiply
    514.78x = 710.39 × 293.72
  4. Step 4: Simplify right side
    514.78x = 208,658.26
  5. Step 5: Solve for x
    x = 208,658.26/514.78
  6. Step 6: Final answer
    x = 405.34

Related Problems

Find fourth proportional to 257.39, 355.20 and 146.86
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Double scale
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Similar ratio
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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.