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Finding the Fourth Proportional to 1,004.95, 1,386.41 and 673.48

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Solution

The fourth proportional to 1,004.95, 1,386.41 and 673.48 is: 929.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,004.95 : 1,386.41 = 673.48 : x
  2. Step 2: Convert to fraction form
    1,004.95/1,386.41 = 673.48/x
  3. Step 3: Cross multiply
    1,004.95x = 1,386.41 × 673.48
  4. Step 4: Simplify right side
    1,004.95x = 933,717.77
  5. Step 5: Solve for x
    x = 933,717.77/1,004.95
  6. Step 6: Final answer
    x = 929.12

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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.