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Finding the Fourth Proportional to 1,210.97, 1,671.16 and 706.81

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Solution

The fourth proportional to 1,210.97, 1,671.16 and 706.81 is: 975.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.97 : 1,671.16 = 706.81 : x
  2. Step 2: Convert to fraction form
    1,210.97/1,671.16 = 706.81/x
  3. Step 3: Cross multiply
    1,210.97x = 1,671.16 × 706.81
  4. Step 4: Simplify right side
    1,210.97x = 1,181,192.60
  5. Step 5: Solve for x
    x = 1,181,192.60/1,210.97
  6. Step 6: Final answer
    x = 975.41

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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.