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Finding the Fourth Proportional to 2,605.44, 3,907.80 and 657.53

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Solution

The fourth proportional to 2,605.44, 3,907.80 and 657.53 is: 986.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,605.44 : 3,907.80 = 657.53 : x
  2. Step 2: Convert to fraction form
    2,605.44/3,907.80 = 657.53/x
  3. Step 3: Cross multiply
    2,605.44x = 3,907.80 × 657.53
  4. Step 4: Simplify right side
    2,605.44x = 2,569,476.20
  5. Step 5: Solve for x
    x = 2,569,476.20/2,605.44
  6. Step 6: Final answer
    x = 986.20

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1.5x scale

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.