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Finding the Fourth Proportional to 890.49, 1,335.75 and 404.10

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Solution

The fourth proportional to 890.49, 1,335.75 and 404.10 is: 606.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.49 : 1,335.75 = 404.10 : x
  2. Step 2: Convert to fraction form
    890.49/1,335.75 = 404.10/x
  3. Step 3: Cross multiply
    890.49x = 1,335.75 × 404.10
  4. Step 4: Simplify right side
    890.49x = 539,776.58
  5. Step 5: Solve for x
    x = 539,776.58/890.49
  6. Step 6: Final answer
    x = 606.16

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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.