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Finding the Fourth Proportional to 1,095.15, 1,639.54 and 631.53

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Solution

The fourth proportional to 1,095.15, 1,639.54 and 631.53 is: 945.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,095.15 : 1,639.54 = 631.53 : x
  2. Step 2: Convert to fraction form
    1,095.15/1,639.54 = 631.53/x
  3. Step 3: Cross multiply
    1,095.15x = 1,639.54 × 631.53
  4. Step 4: Simplify right side
    1,095.15x = 1,035,419.49
  5. Step 5: Solve for x
    x = 1,035,419.49/1,095.15
  6. Step 6: Final answer
    x = 945.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.