Home / 1,435.81-2,157.32-916.05

Finding the Fourth Proportional to 1,435.81, 2,157.32 and 916.05

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Solution

The fourth proportional to 1,435.81, 2,157.32 and 916.05 is: 1,376.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,435.81 : 2,157.32 = 916.05 : x
  2. Step 2: Convert to fraction form
    1,435.81/2,157.32 = 916.05/x
  3. Step 3: Cross multiply
    1,435.81x = 2,157.32 × 916.05
  4. Step 4: Simplify right side
    1,435.81x = 1,976,212.99
  5. Step 5: Solve for x
    x = 1,976,212.99/1,435.81
  6. Step 6: Final answer
    x = 1,376.37

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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.