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Finding the Fourth Proportional to 1,055.10, 1,455.87 and 635.19

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Solution

The fourth proportional to 1,055.10, 1,455.87 and 635.19 is: 876.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,055.10 : 1,455.87 = 635.19 : x
  2. Step 2: Convert to fraction form
    1,055.10/1,455.87 = 635.19/x
  3. Step 3: Cross multiply
    1,055.10x = 1,455.87 × 635.19
  4. Step 4: Simplify right side
    1,055.10x = 924,754.07
  5. Step 5: Solve for x
    x = 924,754.07/1,055.10
  6. Step 6: Final answer
    x = 876.46

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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.