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Finding the Fourth Proportional to 1,026.48, 1,540 and 441.16

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Solution

The fourth proportional to 1,026.48, 1,540 and 441.16 is: 661.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,026.48 : 1,540 = 441.16 : x
  2. Step 2: Convert to fraction form
    1,026.48/1,540 = 441.16/x
  3. Step 3: Cross multiply
    1,026.48x = 1,540 × 441.16
  4. Step 4: Simplify right side
    1,026.48x = 679,386.40
  5. Step 5: Solve for x
    x = 679,386.40/1,026.48
  6. Step 6: Final answer
    x = 661.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.