Home / 1,055.36-1,581.63-438.35

Finding the Fourth Proportional to 1,055.36, 1,581.63 and 438.35

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Solution

The fourth proportional to 1,055.36, 1,581.63 and 438.35 is: 656.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,055.36 : 1,581.63 = 438.35 : x
  2. Step 2: Convert to fraction form
    1,055.36/1,581.63 = 438.35/x
  3. Step 3: Cross multiply
    1,055.36x = 1,581.63 × 438.35
  4. Step 4: Simplify right side
    1,055.36x = 693,297.96
  5. Step 5: Solve for x
    x = 693,297.96/1,055.36
  6. Step 6: Final answer
    x = 656.93

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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.