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Finding the Fourth Proportional to 1,059.64, 1,587.16 and 874.96

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Solution

The fourth proportional to 1,059.64, 1,587.16 and 874.96 is: 1,310.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,059.64 : 1,587.16 = 874.96 : x
  2. Step 2: Convert to fraction form
    1,059.64/1,587.16 = 874.96/x
  3. Step 3: Cross multiply
    1,059.64x = 1,587.16 × 874.96
  4. Step 4: Simplify right side
    1,059.64x = 1,388,701.51
  5. Step 5: Solve for x
    x = 1,388,701.51/1,059.64
  6. Step 6: Final answer
    x = 1,310.54

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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.