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Finding the Fourth Proportional to 720.60, 993.96 and 454.79

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Solution

The fourth proportional to 720.60, 993.96 and 454.79 is: 627.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.60 : 993.96 = 454.79 : x
  2. Step 2: Convert to fraction form
    720.60/993.96 = 454.79/x
  3. Step 3: Cross multiply
    720.60x = 993.96 × 454.79
  4. Step 4: Simplify right side
    720.60x = 452,038.10
  5. Step 5: Solve for x
    x = 452,038.10/720.60
  6. Step 6: Final answer
    x = 627.31

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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.