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Finding the Fourth Proportional to 790.62, 1,090.95 and 693.18

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Solution

The fourth proportional to 790.62, 1,090.95 and 693.18 is: 956.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    790.62 : 1,090.95 = 693.18 : x
  2. Step 2: Convert to fraction form
    790.62/1,090.95 = 693.18/x
  3. Step 3: Cross multiply
    790.62x = 1,090.95 × 693.18
  4. Step 4: Simplify right side
    790.62x = 756,224.72
  5. Step 5: Solve for x
    x = 756,224.72/790.62
  6. Step 6: Final answer
    x = 956.50

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.