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Finding the Fourth Proportional to 841.79, 1,262.68 and 321.67

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Solution

The fourth proportional to 841.79, 1,262.68 and 321.67 is: 482.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    841.79 : 1,262.68 = 321.67 : x
  2. Step 2: Convert to fraction form
    841.79/1,262.68 = 321.67/x
  3. Step 3: Cross multiply
    841.79x = 1,262.68 × 321.67
  4. Step 4: Simplify right side
    841.79x = 406,166.28
  5. Step 5: Solve for x
    x = 406,166.28/841.79
  6. Step 6: Final answer
    x = 482.50

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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.