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Finding the Fourth Proportional to 890.95, 1,336.47 and 404.04

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Solution

The fourth proportional to 890.95, 1,336.47 and 404.04 is: 606.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.95 : 1,336.47 = 404.04 : x
  2. Step 2: Convert to fraction form
    890.95/1,336.47 = 404.04/x
  3. Step 3: Cross multiply
    890.95x = 1,336.47 × 404.04
  4. Step 4: Simplify right side
    890.95x = 539,980.66
  5. Step 5: Solve for x
    x = 539,980.66/890.95
  6. Step 6: Final answer
    x = 606.07

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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.