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Finding the Fourth Proportional to 522.61, 720.88 and 345.57

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Solution

The fourth proportional to 522.61, 720.88 and 345.57 is: 476.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.61 : 720.88 = 345.57 : x
  2. Step 2: Convert to fraction form
    522.61/720.88 = 345.57/x
  3. Step 3: Cross multiply
    522.61x = 720.88 × 345.57
  4. Step 4: Simplify right side
    522.61x = 249,114.50
  5. Step 5: Solve for x
    x = 249,114.50/522.61
  6. Step 6: Final answer
    x = 476.67

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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.