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Finding the Fourth Proportional to 1,762.40, 2,643.78 and 608

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Solution

The fourth proportional to 1,762.40, 2,643.78 and 608 is: 912.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,762.40 : 2,643.78 = 608 : x
  2. Step 2: Convert to fraction form
    1,762.40/2,643.78 = 608/x
  3. Step 3: Cross multiply
    1,762.40x = 2,643.78 × 608
  4. Step 4: Simplify right side
    1,762.40x = 1,607,418.24
  5. Step 5: Solve for x
    x = 1,607,418.24/1,762.40
  6. Step 6: Final answer
    x = 912.06

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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.