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Finding the Fourth Proportional to 1,116.08, 1,673.40 and 954.80

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Solution

The fourth proportional to 1,116.08, 1,673.40 and 954.80 is: 1,431.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,116.08 : 1,673.40 = 954.80 : x
  2. Step 2: Convert to fraction form
    1,116.08/1,673.40 = 954.80/x
  3. Step 3: Cross multiply
    1,116.08x = 1,673.40 × 954.80
  4. Step 4: Simplify right side
    1,116.08x = 1,597,762.32
  5. Step 5: Solve for x
    x = 1,597,762.32/1,116.08
  6. Step 6: Final answer
    x = 1,431.58

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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.