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Finding the Fourth Proportional to 462.40, 692.16 and 346.20

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Solution

The fourth proportional to 462.40, 692.16 and 346.20 is: 518.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    462.40 : 692.16 = 346.20 : x
  2. Step 2: Convert to fraction form
    462.40/692.16 = 346.20/x
  3. Step 3: Cross multiply
    462.40x = 692.16 × 346.20
  4. Step 4: Simplify right side
    462.40x = 239,625.79
  5. Step 5: Solve for x
    x = 239,625.79/462.40
  6. Step 6: Final answer
    x = 518.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.