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Finding the Fourth Proportional to 890.99, 1,335.47 and 342.89

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Solution

The fourth proportional to 890.99, 1,335.47 and 342.89 is: 513.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.99 : 1,335.47 = 342.89 : x
  2. Step 2: Convert to fraction form
    890.99/1,335.47 = 342.89/x
  3. Step 3: Cross multiply
    890.99x = 1,335.47 × 342.89
  4. Step 4: Simplify right side
    890.99x = 457,920.93
  5. Step 5: Solve for x
    x = 457,920.93/890.99
  6. Step 6: Final answer
    x = 513.94

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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.