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Finding the Fourth Proportional to 1,058.51, 1,461.45 and 660.77

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Solution

The fourth proportional to 1,058.51, 1,461.45 and 660.77 is: 912.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,058.51 : 1,461.45 = 660.77 : x
  2. Step 2: Convert to fraction form
    1,058.51/1,461.45 = 660.77/x
  3. Step 3: Cross multiply
    1,058.51x = 1,461.45 × 660.77
  4. Step 4: Simplify right side
    1,058.51x = 965,685.97
  5. Step 5: Solve for x
    x = 965,685.97/1,058.51
  6. Step 6: Final answer
    x = 912.31

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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.