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Finding the Fourth Proportional to 910.99, 1,366.50 and 355.74

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Solution

The fourth proportional to 910.99, 1,366.50 and 355.74 is: 533.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.99 : 1,366.50 = 355.74 : x
  2. Step 2: Convert to fraction form
    910.99/1,366.50 = 355.74/x
  3. Step 3: Cross multiply
    910.99x = 1,366.50 × 355.74
  4. Step 4: Simplify right side
    910.99x = 486,118.71
  5. Step 5: Solve for x
    x = 486,118.71/910.99
  6. Step 6: Final answer
    x = 533.62

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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.