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Finding the Fourth Proportional to 813.94, 1,119.90 and 703.06

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Solution

The fourth proportional to 813.94, 1,119.90 and 703.06 is: 967.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    813.94 : 1,119.90 = 703.06 : x
  2. Step 2: Convert to fraction form
    813.94/1,119.90 = 703.06/x
  3. Step 3: Cross multiply
    813.94x = 1,119.90 × 703.06
  4. Step 4: Simplify right side
    813.94x = 787,356.89
  5. Step 5: Solve for x
    x = 787,356.89/813.94
  6. Step 6: Final answer
    x = 967.34

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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.