Home / 1,435.28-2,153.40-858.32

Finding the Fourth Proportional to 1,435.28, 2,153.40 and 858.32

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Solution

The fourth proportional to 1,435.28, 2,153.40 and 858.32 is: 1,287.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,435.28 : 2,153.40 = 858.32 : x
  2. Step 2: Convert to fraction form
    1,435.28/2,153.40 = 858.32/x
  3. Step 3: Cross multiply
    1,435.28x = 2,153.40 × 858.32
  4. Step 4: Simplify right side
    1,435.28x = 1,848,306.29
  5. Step 5: Solve for x
    x = 1,848,306.29/1,435.28
  6. Step 6: Final answer
    x = 1,287.77

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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.