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Finding the Fourth Proportional to 890.88, 1,335.48 and 342.68

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Solution

The fourth proportional to 890.88, 1,335.48 and 342.68 is: 513.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.88 : 1,335.48 = 342.68 : x
  2. Step 2: Convert to fraction form
    890.88/1,335.48 = 342.68/x
  3. Step 3: Cross multiply
    890.88x = 1,335.48 × 342.68
  4. Step 4: Simplify right side
    890.88x = 457,642.29
  5. Step 5: Solve for x
    x = 457,642.29/890.88
  6. Step 6: Final answer
    x = 513.70

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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.