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Finding the Fourth Proportional to 866.06, 1,299.18 and 288.98

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Solution

The fourth proportional to 866.06, 1,299.18 and 288.98 is: 433.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    866.06 : 1,299.18 = 288.98 : x
  2. Step 2: Convert to fraction form
    866.06/1,299.18 = 288.98/x
  3. Step 3: Cross multiply
    866.06x = 1,299.18 × 288.98
  4. Step 4: Simplify right side
    866.06x = 375,437.04
  5. Step 5: Solve for x
    x = 375,437.04/866.06
  6. Step 6: Final answer
    x = 433.50

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Double scale
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1.5x scale

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.