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Finding the Fourth Proportional to 1,106.25, 1,527.32 and 714

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Solution

The fourth proportional to 1,106.25, 1,527.32 and 714 is: 985.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,106.25 : 1,527.32 = 714 : x
  2. Step 2: Convert to fraction form
    1,106.25/1,527.32 = 714/x
  3. Step 3: Cross multiply
    1,106.25x = 1,527.32 × 714
  4. Step 4: Simplify right side
    1,106.25x = 1,090,502.91
  5. Step 5: Solve for x
    x = 1,090,502.91/1,106.25
  6. Step 6: Final answer
    x = 985.77

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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.