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Finding the Fourth Proportional to 1,570.99, 2,168.09 and 908.08

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Solution

The fourth proportional to 1,570.99, 2,168.09 and 908.08 is: 1,253.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,570.99 : 2,168.09 = 908.08 : x
  2. Step 2: Convert to fraction form
    1,570.99/2,168.09 = 908.08/x
  3. Step 3: Cross multiply
    1,570.99x = 2,168.09 × 908.08
  4. Step 4: Simplify right side
    1,570.99x = 1,968,799.17
  5. Step 5: Solve for x
    x = 1,968,799.17/1,570.99
  6. Step 6: Final answer
    x = 1,253.22

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1.5x scale

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.