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Finding the Fourth Proportional to 720.18, 993.24 and 440.28

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Solution

The fourth proportional to 720.18, 993.24 and 440.28 is: 607.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.18 : 993.24 = 440.28 : x
  2. Step 2: Convert to fraction form
    720.18/993.24 = 440.28/x
  3. Step 3: Cross multiply
    720.18x = 993.24 × 440.28
  4. Step 4: Simplify right side
    720.18x = 437,303.71
  5. Step 5: Solve for x
    x = 437,303.71/720.18
  6. Step 6: Final answer
    x = 607.21

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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.