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Finding the Fourth Proportional to 669.63, 924.40 and 492.60

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Solution

The fourth proportional to 669.63, 924.40 and 492.60 is: 680.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.63 : 924.40 = 492.60 : x
  2. Step 2: Convert to fraction form
    669.63/924.40 = 492.60/x
  3. Step 3: Cross multiply
    669.63x = 924.40 × 492.60
  4. Step 4: Simplify right side
    669.63x = 455,355.55
  5. Step 5: Solve for x
    x = 455,355.55/669.63
  6. Step 6: Final answer
    x = 680.01

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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.