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Finding the Fourth Proportional to 1,219.05, 1,682.30 and 695.07

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Solution

The fourth proportional to 1,219.05, 1,682.30 and 695.07 is: 959.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,219.05 : 1,682.30 = 695.07 : x
  2. Step 2: Convert to fraction form
    1,219.05/1,682.30 = 695.07/x
  3. Step 3: Cross multiply
    1,219.05x = 1,682.30 × 695.07
  4. Step 4: Simplify right side
    1,219.05x = 1,169,312.79
  5. Step 5: Solve for x
    x = 1,169,312.79/1,219.05
  6. Step 6: Final answer
    x = 959.20

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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.