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Finding the Fourth Proportional to 520.39, 718.22 and 497.03

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Solution

The fourth proportional to 520.39, 718.22 and 497.03 is: 685.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.39 : 718.22 = 497.03 : x
  2. Step 2: Convert to fraction form
    520.39/718.22 = 497.03/x
  3. Step 3: Cross multiply
    520.39x = 718.22 × 497.03
  4. Step 4: Simplify right side
    520.39x = 356,976.89
  5. Step 5: Solve for x
    x = 356,976.89/520.39
  6. Step 6: Final answer
    x = 685.99

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.