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Finding the Fourth Proportional to 522.77, 720.81 and 345.87

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Solution

The fourth proportional to 522.77, 720.81 and 345.87 is: 476.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.77 : 720.81 = 345.87 : x
  2. Step 2: Convert to fraction form
    522.77/720.81 = 345.87/x
  3. Step 3: Cross multiply
    522.77x = 720.81 × 345.87
  4. Step 4: Simplify right side
    522.77x = 249,306.55
  5. Step 5: Solve for x
    x = 249,306.55/522.77
  6. Step 6: Final answer
    x = 476.90

Related Problems

Find fourth proportional to 261.38, 360.41 and 172.94
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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.