Home / 1,878.32-2,592.60-1,290.32

Finding the Fourth Proportional to 1,878.32, 2,592.60 and 1,290.32

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Solution

The fourth proportional to 1,878.32, 2,592.60 and 1,290.32 is: 1,781.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,878.32 : 2,592.60 = 1,290.32 : x
  2. Step 2: Convert to fraction form
    1,878.32/2,592.60 = 1,290.32/x
  3. Step 3: Cross multiply
    1,878.32x = 2,592.60 × 1,290.32
  4. Step 4: Simplify right side
    1,878.32x = 3,345,283.63
  5. Step 5: Solve for x
    x = 3,345,283.63/1,878.32
  6. Step 6: Final answer
    x = 1,781.00

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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.