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Finding the Fourth Proportional to 890.68, 1,337.64 and 404.68

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Solution

The fourth proportional to 890.68, 1,337.64 and 404.68 is: 607.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.68 : 1,337.64 = 404.68 : x
  2. Step 2: Convert to fraction form
    890.68/1,337.64 = 404.68/x
  3. Step 3: Cross multiply
    890.68x = 1,337.64 × 404.68
  4. Step 4: Simplify right side
    890.68x = 541,316.16
  5. Step 5: Solve for x
    x = 541,316.16/890.68
  6. Step 6: Final answer
    x = 607.76

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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.