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Finding the Fourth Proportional to 1,715.11, 2,366.90 and 969.10

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Solution

The fourth proportional to 1,715.11, 2,366.90 and 969.10 is: 1,337.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,715.11 : 2,366.90 = 969.10 : x
  2. Step 2: Convert to fraction form
    1,715.11/2,366.90 = 969.10/x
  3. Step 3: Cross multiply
    1,715.11x = 2,366.90 × 969.10
  4. Step 4: Simplify right side
    1,715.11x = 2,293,762.79
  5. Step 5: Solve for x
    x = 2,293,762.79/1,715.11
  6. Step 6: Final answer
    x = 1,337.39

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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.