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Finding the Fourth Proportional to 520.76, 718.26 and 346.34

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Solution

The fourth proportional to 520.76, 718.26 and 346.34 is: 477.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.76 : 718.26 = 346.34 : x
  2. Step 2: Convert to fraction form
    520.76/718.26 = 346.34/x
  3. Step 3: Cross multiply
    520.76x = 718.26 × 346.34
  4. Step 4: Simplify right side
    520.76x = 248,762.17
  5. Step 5: Solve for x
    x = 248,762.17/520.76
  6. Step 6: Final answer
    x = 477.69

Related Problems

Find fourth proportional to 260.38, 359.13 and 173.17
Half scale
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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.