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Finding the Fourth Proportional to 720.04, 993.72 and 425.40

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Solution

The fourth proportional to 720.04, 993.72 and 425.40 is: 587.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.04 : 993.72 = 425.40 : x
  2. Step 2: Convert to fraction form
    720.04/993.72 = 425.40/x
  3. Step 3: Cross multiply
    720.04x = 993.72 × 425.40
  4. Step 4: Simplify right side
    720.04x = 422,729.55
  5. Step 5: Solve for x
    x = 422,729.55/720.04
  6. Step 6: Final answer
    x = 587.09

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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.