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Finding the Fourth Proportional to 1,531.71, 2,114.10 and 934.34

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Solution

The fourth proportional to 1,531.71, 2,114.10 and 934.34 is: 1,289.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,531.71 : 2,114.10 = 934.34 : x
  2. Step 2: Convert to fraction form
    1,531.71/2,114.10 = 934.34/x
  3. Step 3: Cross multiply
    1,531.71x = 2,114.10 × 934.34
  4. Step 4: Simplify right side
    1,531.71x = 1,975,277.62
  5. Step 5: Solve for x
    x = 1,975,277.62/1,531.71
  6. Step 6: Final answer
    x = 1,289.59

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1.5x scale

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.