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Finding the Fourth Proportional to 1,274.56, 1,758.56 and 802.54

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Solution

The fourth proportional to 1,274.56, 1,758.56 and 802.54 is: 1,107.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,274.56 : 1,758.56 = 802.54 : x
  2. Step 2: Convert to fraction form
    1,274.56/1,758.56 = 802.54/x
  3. Step 3: Cross multiply
    1,274.56x = 1,758.56 × 802.54
  4. Step 4: Simplify right side
    1,274.56x = 1,411,314.74
  5. Step 5: Solve for x
    x = 1,411,314.74/1,274.56
  6. Step 6: Final answer
    x = 1,107.30

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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.