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Finding the Fourth Proportional to 520.29, 718.18 and 345.69

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Solution

The fourth proportional to 520.29, 718.18 and 345.69 is: 477.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.29 : 718.18 = 345.69 : x
  2. Step 2: Convert to fraction form
    520.29/718.18 = 345.69/x
  3. Step 3: Cross multiply
    520.29x = 718.18 × 345.69
  4. Step 4: Simplify right side
    520.29x = 248,266.78
  5. Step 5: Solve for x
    x = 248,266.78/520.29
  6. Step 6: Final answer
    x = 477.17

Related Problems

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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.