Home / 4,989.78-7,485.12-1,292.00

Finding the Fourth Proportional to 4,989.78, 7,485.12 and 1,292.00

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Solution

The fourth proportional to 4,989.78, 7,485.12 and 1,292.00 is: 1,938.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,989.78 : 7,485.12 = 1,292.00 : x
  2. Step 2: Convert to fraction form
    4,989.78/7,485.12 = 1,292.00/x
  3. Step 3: Cross multiply
    4,989.78x = 7,485.12 × 1,292.00
  4. Step 4: Simplify right side
    4,989.78x = 9,670,737.61
  5. Step 5: Solve for x
    x = 9,670,737.61/4,989.78
  6. Step 6: Final answer
    x = 1,938.11

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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.