Home / 1,528.05-2,108.64-890.07

Finding the Fourth Proportional to 1,528.05, 2,108.64 and 890.07

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Solution

The fourth proportional to 1,528.05, 2,108.64 and 890.07 is: 1,228.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,528.05 : 2,108.64 = 890.07 : x
  2. Step 2: Convert to fraction form
    1,528.05/2,108.64 = 890.07/x
  3. Step 3: Cross multiply
    1,528.05x = 2,108.64 × 890.07
  4. Step 4: Simplify right side
    1,528.05x = 1,876,837.20
  5. Step 5: Solve for x
    x = 1,876,837.20/1,528.05
  6. Step 6: Final answer
    x = 1,228.26

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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.