Home / 1,333.32-1,987.65-1,312.26

Finding the Fourth Proportional to 1,333.32, 1,987.65 and 1,312.26

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Solution

The fourth proportional to 1,333.32, 1,987.65 and 1,312.26 is: 1,956.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,333.32 : 1,987.65 = 1,312.26 : x
  2. Step 2: Convert to fraction form
    1,333.32/1,987.65 = 1,312.26/x
  3. Step 3: Cross multiply
    1,333.32x = 1,987.65 × 1,312.26
  4. Step 4: Simplify right side
    1,333.32x = 2,608,313.59
  5. Step 5: Solve for x
    x = 2,608,313.59/1,333.32
  6. Step 6: Final answer
    x = 1,956.25

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.