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Finding the Fourth Proportional to 899.65, 1,241.72 and 526.80

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Solution

The fourth proportional to 899.65, 1,241.72 and 526.80 is: 727.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.65 : 1,241.72 = 526.80 : x
  2. Step 2: Convert to fraction form
    899.65/1,241.72 = 526.80/x
  3. Step 3: Cross multiply
    899.65x = 1,241.72 × 526.80
  4. Step 4: Simplify right side
    899.65x = 654,138.10
  5. Step 5: Solve for x
    x = 654,138.10/899.65
  6. Step 6: Final answer
    x = 727.10

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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.