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Finding the Fourth Proportional to 1,025.94, 1,539.34 and 539.30

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Solution

The fourth proportional to 1,025.94, 1,539.34 and 539.30 is: 809.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,025.94 : 1,539.34 = 539.30 : x
  2. Step 2: Convert to fraction form
    1,025.94/1,539.34 = 539.30/x
  3. Step 3: Cross multiply
    1,025.94x = 1,539.34 × 539.30
  4. Step 4: Simplify right side
    1,025.94x = 830,166.06
  5. Step 5: Solve for x
    x = 830,166.06/1,025.94
  6. Step 6: Final answer
    x = 809.18

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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.