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Finding the Fourth Proportional to 1,230.69, 1,698.29 and 671.16

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Solution

The fourth proportional to 1,230.69, 1,698.29 and 671.16 is: 926.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,230.69 : 1,698.29 = 671.16 : x
  2. Step 2: Convert to fraction form
    1,230.69/1,698.29 = 671.16/x
  3. Step 3: Cross multiply
    1,230.69x = 1,698.29 × 671.16
  4. Step 4: Simplify right side
    1,230.69x = 1,139,820.96
  5. Step 5: Solve for x
    x = 1,139,820.96/1,230.69
  6. Step 6: Final answer
    x = 926.16

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Double scale
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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.