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Finding the Fourth Proportional to 1,570.72, 2,166.96 and 948.64

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Solution

The fourth proportional to 1,570.72, 2,166.96 and 948.64 is: 1,308.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,570.72 : 2,166.96 = 948.64 : x
  2. Step 2: Convert to fraction form
    1,570.72/2,166.96 = 948.64/x
  3. Step 3: Cross multiply
    1,570.72x = 2,166.96 × 948.64
  4. Step 4: Simplify right side
    1,570.72x = 2,055,664.93
  5. Step 5: Solve for x
    x = 2,055,664.93/1,570.72
  6. Step 6: Final answer
    x = 1,308.74

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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.