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Finding the Fourth Proportional to 522.66, 721.35 and 345.66

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Solution

The fourth proportional to 522.66, 721.35 and 345.66 is: 477.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.66 : 721.35 = 345.66 : x
  2. Step 2: Convert to fraction form
    522.66/721.35 = 345.66/x
  3. Step 3: Cross multiply
    522.66x = 721.35 × 345.66
  4. Step 4: Simplify right side
    522.66x = 249,341.84
  5. Step 5: Solve for x
    x = 249,341.84/522.66
  6. Step 6: Final answer
    x = 477.06

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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.