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Finding the Fourth Proportional to 1,313.54, 1,807.31 and 1,048.12

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Solution

The fourth proportional to 1,313.54, 1,807.31 and 1,048.12 is: 1,442.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,313.54 : 1,807.31 = 1,048.12 : x
  2. Step 2: Convert to fraction form
    1,313.54/1,807.31 = 1,048.12/x
  3. Step 3: Cross multiply
    1,313.54x = 1,807.31 × 1,048.12
  4. Step 4: Simplify right side
    1,313.54x = 1,894,277.76
  5. Step 5: Solve for x
    x = 1,894,277.76/1,313.54
  6. Step 6: Final answer
    x = 1,442.12

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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.