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Finding the Fourth Proportional to 720.23, 992.25 and 635.45

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Solution

The fourth proportional to 720.23, 992.25 and 635.45 is: 875.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.23 : 992.25 = 635.45 : x
  2. Step 2: Convert to fraction form
    720.23/992.25 = 635.45/x
  3. Step 3: Cross multiply
    720.23x = 992.25 × 635.45
  4. Step 4: Simplify right side
    720.23x = 630,520.30
  5. Step 5: Solve for x
    x = 630,520.30/720.23
  6. Step 6: Final answer
    x = 875.45

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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.