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Finding the Fourth Proportional to 890.16, 1,334.54 and 304.78

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Solution

The fourth proportional to 890.16, 1,334.54 and 304.78 is: 456.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.16 : 1,334.54 = 304.78 : x
  2. Step 2: Convert to fraction form
    890.16/1,334.54 = 304.78/x
  3. Step 3: Cross multiply
    890.16x = 1,334.54 × 304.78
  4. Step 4: Simplify right side
    890.16x = 406,741.10
  5. Step 5: Solve for x
    x = 406,741.10/890.16
  6. Step 6: Final answer
    x = 456.93

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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.