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Finding the Fourth Proportional to 1,054.92, 1,583.10 and 478.20

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Solution

The fourth proportional to 1,054.92, 1,583.10 and 478.20 is: 717.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,054.92 : 1,583.10 = 478.20 : x
  2. Step 2: Convert to fraction form
    1,054.92/1,583.10 = 478.20/x
  3. Step 3: Cross multiply
    1,054.92x = 1,583.10 × 478.20
  4. Step 4: Simplify right side
    1,054.92x = 757,038.42
  5. Step 5: Solve for x
    x = 757,038.42/1,054.92
  6. Step 6: Final answer
    x = 717.63

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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.