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Finding the Fourth Proportional to 1,623.42, 2,435.19 and 698.25

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Solution

The fourth proportional to 1,623.42, 2,435.19 and 698.25 is: 1,047.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,623.42 : 2,435.19 = 698.25 : x
  2. Step 2: Convert to fraction form
    1,623.42/2,435.19 = 698.25/x
  3. Step 3: Cross multiply
    1,623.42x = 2,435.19 × 698.25
  4. Step 4: Simplify right side
    1,623.42x = 1,700,371.42
  5. Step 5: Solve for x
    x = 1,700,371.42/1,623.42
  6. Step 6: Final answer
    x = 1,047.40

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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.