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Finding the Fourth Proportional to 891.07, 1,336.60 and 525.35

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Solution

The fourth proportional to 891.07, 1,336.60 and 525.35 is: 788.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.07 : 1,336.60 = 525.35 : x
  2. Step 2: Convert to fraction form
    891.07/1,336.60 = 525.35/x
  3. Step 3: Cross multiply
    891.07x = 1,336.60 × 525.35
  4. Step 4: Simplify right side
    891.07x = 702,182.81
  5. Step 5: Solve for x
    x = 702,182.81/891.07
  6. Step 6: Final answer
    x = 788.02

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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.