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Finding the Fourth Proportional to 1,025.84, 1,538.74 and 698.88

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Solution

The fourth proportional to 1,025.84, 1,538.74 and 698.88 is: 1,048.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,025.84 : 1,538.74 = 698.88 : x
  2. Step 2: Convert to fraction form
    1,025.84/1,538.74 = 698.88/x
  3. Step 3: Cross multiply
    1,025.84x = 1,538.74 × 698.88
  4. Step 4: Simplify right side
    1,025.84x = 1,075,394.61
  5. Step 5: Solve for x
    x = 1,075,394.61/1,025.84
  6. Step 6: Final answer
    x = 1,048.31

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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.