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Finding the Fourth Proportional to 890.42, 1,335.80 and 370.14

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Solution

The fourth proportional to 890.42, 1,335.80 and 370.14 is: 555.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.42 : 1,335.80 = 370.14 : x
  2. Step 2: Convert to fraction form
    890.42/1,335.80 = 370.14/x
  3. Step 3: Cross multiply
    890.42x = 1,335.80 × 370.14
  4. Step 4: Simplify right side
    890.42x = 494,431.16
  5. Step 5: Solve for x
    x = 494,431.16/890.42
  6. Step 6: Final answer
    x = 555.28

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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.