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Finding the Fourth Proportional to 720.54, 993.18 and 625.77

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Solution

The fourth proportional to 720.54, 993.18 and 625.77 is: 862.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.54 : 993.18 = 625.77 : x
  2. Step 2: Convert to fraction form
    720.54/993.18 = 625.77/x
  3. Step 3: Cross multiply
    720.54x = 993.18 × 625.77
  4. Step 4: Simplify right side
    720.54x = 621,494.15
  5. Step 5: Solve for x
    x = 621,494.15/720.54
  6. Step 6: Final answer
    x = 862.55

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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.