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Finding the Fourth Proportional to 1,589.90, 2,386.90 and 1,224.94

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Solution

The fourth proportional to 1,589.90, 2,386.90 and 1,224.94 is: 1,838.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,589.90 : 2,386.90 = 1,224.94 : x
  2. Step 2: Convert to fraction form
    1,589.90/2,386.90 = 1,224.94/x
  3. Step 3: Cross multiply
    1,589.90x = 2,386.90 × 1,224.94
  4. Step 4: Simplify right side
    1,589.90x = 2,923,809.29
  5. Step 5: Solve for x
    x = 2,923,809.29/1,589.90
  6. Step 6: Final answer
    x = 1,838.99

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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.