Home / 1,210.27-1,669.74-768.10

Finding the Fourth Proportional to 1,210.27, 1,669.74 and 768.10

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Solution

The fourth proportional to 1,210.27, 1,669.74 and 768.10 is: 1,059.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.27 : 1,669.74 = 768.10 : x
  2. Step 2: Convert to fraction form
    1,210.27/1,669.74 = 768.10/x
  3. Step 3: Cross multiply
    1,210.27x = 1,669.74 × 768.10
  4. Step 4: Simplify right side
    1,210.27x = 1,282,527.29
  5. Step 5: Solve for x
    x = 1,282,527.29/1,210.27
  6. Step 6: Final answer
    x = 1,059.70

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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.