Home / 1,585.21-2,188.31-1,055.03

Finding the Fourth Proportional to 1,585.21, 2,188.31 and 1,055.03

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Solution

The fourth proportional to 1,585.21, 2,188.31 and 1,055.03 is: 1,456.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,585.21 : 2,188.31 = 1,055.03 : x
  2. Step 2: Convert to fraction form
    1,585.21/2,188.31 = 1,055.03/x
  3. Step 3: Cross multiply
    1,585.21x = 2,188.31 × 1,055.03
  4. Step 4: Simplify right side
    1,585.21x = 2,308,737.91
  5. Step 5: Solve for x
    x = 2,308,737.91/1,585.21
  6. Step 6: Final answer
    x = 1,456.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.