Home / 1,677.28-2,320.56-1,640.32

Finding the Fourth Proportional to 1,677.28, 2,320.56 and 1,640.32

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Solution

The fourth proportional to 1,677.28, 2,320.56 and 1,640.32 is: 2,269.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,677.28 : 2,320.56 = 1,640.32 : x
  2. Step 2: Convert to fraction form
    1,677.28/2,320.56 = 1,640.32/x
  3. Step 3: Cross multiply
    1,677.28x = 2,320.56 × 1,640.32
  4. Step 4: Simplify right side
    1,677.28x = 3,806,460.98
  5. Step 5: Solve for x
    x = 3,806,460.98/1,677.28
  6. Step 6: Final answer
    x = 2,269.42

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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.