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Finding the Fourth Proportional to 1,005.51, 1,388.48 and 633.13

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Solution

The fourth proportional to 1,005.51, 1,388.48 and 633.13 is: 874.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,005.51 : 1,388.48 = 633.13 : x
  2. Step 2: Convert to fraction form
    1,005.51/1,388.48 = 633.13/x
  3. Step 3: Cross multiply
    1,005.51x = 1,388.48 × 633.13
  4. Step 4: Simplify right side
    1,005.51x = 879,088.34
  5. Step 5: Solve for x
    x = 879,088.34/1,005.51
  6. Step 6: Final answer
    x = 874.27

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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.