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Finding the Fourth Proportional to 1,485.02, 2,227.78 and 619.40

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Solution

The fourth proportional to 1,485.02, 2,227.78 and 619.40 is: 929.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.02 : 2,227.78 = 619.40 : x
  2. Step 2: Convert to fraction form
    1,485.02/2,227.78 = 619.40/x
  3. Step 3: Cross multiply
    1,485.02x = 2,227.78 × 619.40
  4. Step 4: Simplify right side
    1,485.02x = 1,379,886.93
  5. Step 5: Solve for x
    x = 1,379,886.93/1,485.02
  6. Step 6: Final answer
    x = 929.20

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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.