Home / 1,690.40-2,336.64-1,554.32

Finding the Fourth Proportional to 1,690.40, 2,336.64 and 1,554.32

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Solution

The fourth proportional to 1,690.40, 2,336.64 and 1,554.32 is: 2,148.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,690.40 : 2,336.64 = 1,554.32 : x
  2. Step 2: Convert to fraction form
    1,690.40/2,336.64 = 1,554.32/x
  3. Step 3: Cross multiply
    1,690.40x = 2,336.64 × 1,554.32
  4. Step 4: Simplify right side
    1,690.40x = 3,631,886.28
  5. Step 5: Solve for x
    x = 3,631,886.28/1,690.40
  6. Step 6: Final answer
    x = 2,148.54

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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.