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Finding the Fourth Proportional to 1,230.58, 1,698.12 and 671.02

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Solution

The fourth proportional to 1,230.58, 1,698.12 and 671.02 is: 925.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,230.58 : 1,698.12 = 671.02 : x
  2. Step 2: Convert to fraction form
    1,230.58/1,698.12 = 671.02/x
  3. Step 3: Cross multiply
    1,230.58x = 1,698.12 × 671.02
  4. Step 4: Simplify right side
    1,230.58x = 1,139,472.48
  5. Step 5: Solve for x
    x = 1,139,472.48/1,230.58
  6. Step 6: Final answer
    x = 925.96

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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.