Home / 1,643.85-2,267.40-1,055.10

Finding the Fourth Proportional to 1,643.85, 2,267.40 and 1,055.10

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Solution

The fourth proportional to 1,643.85, 2,267.40 and 1,055.10 is: 1,455.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,643.85 : 2,267.40 = 1,055.10 : x
  2. Step 2: Convert to fraction form
    1,643.85/2,267.40 = 1,055.10/x
  3. Step 3: Cross multiply
    1,643.85x = 2,267.40 × 1,055.10
  4. Step 4: Simplify right side
    1,643.85x = 2,392,333.74
  5. Step 5: Solve for x
    x = 2,392,333.74/1,643.85
  6. Step 6: Final answer
    x = 1,455.32

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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.