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Finding the Fourth Proportional to 522.69, 720.15 and 345.33

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Solution

The fourth proportional to 522.69, 720.15 and 345.33 is: 475.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.69 : 720.15 = 345.33 : x
  2. Step 2: Convert to fraction form
    522.69/720.15 = 345.33/x
  3. Step 3: Cross multiply
    522.69x = 720.15 × 345.33
  4. Step 4: Simplify right side
    522.69x = 248,689.40
  5. Step 5: Solve for x
    x = 248,689.40/522.69
  6. Step 6: Final answer
    x = 475.79

Related Problems

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Double scale
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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.