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Finding the Fourth Proportional to 667.89, 921.74 and 435.02

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Solution

The fourth proportional to 667.89, 921.74 and 435.02 is: 600.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.89 : 921.74 = 435.02 : x
  2. Step 2: Convert to fraction form
    667.89/921.74 = 435.02/x
  3. Step 3: Cross multiply
    667.89x = 921.74 × 435.02
  4. Step 4: Simplify right side
    667.89x = 400,968.55
  5. Step 5: Solve for x
    x = 400,968.55/667.89
  6. Step 6: Final answer
    x = 600.35

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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.