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Finding the Fourth Proportional to 1,254.12, 1,878.62 and 570.60

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Solution

The fourth proportional to 1,254.12, 1,878.62 and 570.60 is: 854.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,254.12 : 1,878.62 = 570.60 : x
  2. Step 2: Convert to fraction form
    1,254.12/1,878.62 = 570.60/x
  3. Step 3: Cross multiply
    1,254.12x = 1,878.62 × 570.60
  4. Step 4: Simplify right side
    1,254.12x = 1,071,940.57
  5. Step 5: Solve for x
    x = 1,071,940.57/1,254.12
  6. Step 6: Final answer
    x = 854.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.