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Finding the Fourth Proportional to 1,707.68, 2,356.08 and 1,209.92

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Solution

The fourth proportional to 1,707.68, 2,356.08 and 1,209.92 is: 1,669.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,707.68 : 2,356.08 = 1,209.92 : x
  2. Step 2: Convert to fraction form
    1,707.68/2,356.08 = 1,209.92/x
  3. Step 3: Cross multiply
    1,707.68x = 2,356.08 × 1,209.92
  4. Step 4: Simplify right side
    1,707.68x = 2,850,668.31
  5. Step 5: Solve for x
    x = 2,850,668.31/1,707.68
  6. Step 6: Final answer
    x = 1,669.32

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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.