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Finding the Fourth Proportional to 720.16, 993.48 and 692.22

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Solution

The fourth proportional to 720.16, 993.48 and 692.22 is: 954.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.16 : 993.48 = 692.22 : x
  2. Step 2: Convert to fraction form
    720.16/993.48 = 692.22/x
  3. Step 3: Cross multiply
    720.16x = 993.48 × 692.22
  4. Step 4: Simplify right side
    720.16x = 687,700.40
  5. Step 5: Solve for x
    x = 687,700.40/720.16
  6. Step 6: Final answer
    x = 954.93

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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.