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Finding the Fourth Proportional to 1,409.85, 2,114.73 and 435.99

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Solution

The fourth proportional to 1,409.85, 2,114.73 and 435.99 is: 653.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,409.85 : 2,114.73 = 435.99 : x
  2. Step 2: Convert to fraction form
    1,409.85/2,114.73 = 435.99/x
  3. Step 3: Cross multiply
    1,409.85x = 2,114.73 × 435.99
  4. Step 4: Simplify right side
    1,409.85x = 922,001.13
  5. Step 5: Solve for x
    x = 922,001.13/1,409.85
  6. Step 6: Final answer
    x = 653.97

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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.