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Finding the Fourth Proportional to 1,026.09, 1,539.84 and 478.33

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Solution

The fourth proportional to 1,026.09, 1,539.84 and 478.33 is: 717.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,026.09 : 1,539.84 = 478.33 : x
  2. Step 2: Convert to fraction form
    1,026.09/1,539.84 = 478.33/x
  3. Step 3: Cross multiply
    1,026.09x = 1,539.84 × 478.33
  4. Step 4: Simplify right side
    1,026.09x = 736,549.91
  5. Step 5: Solve for x
    x = 736,549.91/1,026.09
  6. Step 6: Final answer
    x = 717.82

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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.