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Finding the Fourth Proportional to 1,026.15, 1,539.24 and 478.72

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Solution

The fourth proportional to 1,026.15, 1,539.24 and 478.72 is: 718.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,026.15 : 1,539.24 = 478.72 : x
  2. Step 2: Convert to fraction form
    1,026.15/1,539.24 = 478.72/x
  3. Step 3: Cross multiply
    1,026.15x = 1,539.24 × 478.72
  4. Step 4: Simplify right side
    1,026.15x = 736,864.97
  5. Step 5: Solve for x
    x = 736,864.97/1,026.15
  6. Step 6: Final answer
    x = 718.09

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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.