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Finding the Fourth Proportional to 841.79, 1,263.59 and 513.24

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Solution

The fourth proportional to 841.79, 1,263.59 and 513.24 is: 770.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    841.79 : 1,263.59 = 513.24 : x
  2. Step 2: Convert to fraction form
    841.79/1,263.59 = 513.24/x
  3. Step 3: Cross multiply
    841.79x = 1,263.59 × 513.24
  4. Step 4: Simplify right side
    841.79x = 648,531.66
  5. Step 5: Solve for x
    x = 648,531.66/841.79
  6. Step 6: Final answer
    x = 770.42

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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.