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Finding the Fourth Proportional to 866.18, 1,299.74 and 404.17

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Solution

The fourth proportional to 866.18, 1,299.74 and 404.17 is: 606.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    866.18 : 1,299.74 = 404.17 : x
  2. Step 2: Convert to fraction form
    866.18/1,299.74 = 404.17/x
  3. Step 3: Cross multiply
    866.18x = 1,299.74 × 404.17
  4. Step 4: Simplify right side
    866.18x = 525,313.89
  5. Step 5: Solve for x
    x = 525,313.89/866.18
  6. Step 6: Final answer
    x = 606.48

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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.