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Finding the Fourth Proportional to 841.40, 1,161.71 and 526.79

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Solution

The fourth proportional to 841.40, 1,161.71 and 526.79 is: 727.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    841.40 : 1,161.71 = 526.79 : x
  2. Step 2: Convert to fraction form
    841.40/1,161.71 = 526.79/x
  3. Step 3: Cross multiply
    841.40x = 1,161.71 × 526.79
  4. Step 4: Simplify right side
    841.40x = 611,977.48
  5. Step 5: Solve for x
    x = 611,977.48/841.40
  6. Step 6: Final answer
    x = 727.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.