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Finding the Fourth Proportional to 1,765.42, 2,648.40 and 579.09

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Solution

The fourth proportional to 1,765.42, 2,648.40 and 579.09 is: 868.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,765.42 : 2,648.40 = 579.09 : x
  2. Step 2: Convert to fraction form
    1,765.42/2,648.40 = 579.09/x
  3. Step 3: Cross multiply
    1,765.42x = 2,648.40 × 579.09
  4. Step 4: Simplify right side
    1,765.42x = 1,533,661.96
  5. Step 5: Solve for x
    x = 1,533,661.96/1,765.42
  6. Step 6: Final answer
    x = 868.72

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1.5x scale

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.