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Finding the Fourth Proportional to 1,529.74, 2,111.09 and 866.69

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Solution

The fourth proportional to 1,529.74, 2,111.09 and 866.69 is: 1,196.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,529.74 : 2,111.09 = 866.69 : x
  2. Step 2: Convert to fraction form
    1,529.74/2,111.09 = 866.69/x
  3. Step 3: Cross multiply
    1,529.74x = 2,111.09 × 866.69
  4. Step 4: Simplify right side
    1,529.74x = 1,829,656.26
  5. Step 5: Solve for x
    x = 1,829,656.26/1,529.74
  6. Step 6: Final answer
    x = 1,196.06

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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.