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Finding the Fourth Proportional to 1,026.78, 1,416.49 and 648.51

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Solution

The fourth proportional to 1,026.78, 1,416.49 and 648.51 is: 894.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,026.78 : 1,416.49 = 648.51 : x
  2. Step 2: Convert to fraction form
    1,026.78/1,416.49 = 648.51/x
  3. Step 3: Cross multiply
    1,026.78x = 1,416.49 × 648.51
  4. Step 4: Simplify right side
    1,026.78x = 918,601.00
  5. Step 5: Solve for x
    x = 918,601.00/1,026.78
  6. Step 6: Final answer
    x = 894.65

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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.