Home / 1,909.29-2,631.47-1,643.07

Finding the Fourth Proportional to 1,909.29, 2,631.47 and 1,643.07

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Solution

The fourth proportional to 1,909.29, 2,631.47 and 1,643.07 is: 2,264.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,909.29 : 2,631.47 = 1,643.07 : x
  2. Step 2: Convert to fraction form
    1,909.29/2,631.47 = 1,643.07/x
  3. Step 3: Cross multiply
    1,909.29x = 2,631.47 × 1,643.07
  4. Step 4: Simplify right side
    1,909.29x = 4,323,681.20
  5. Step 5: Solve for x
    x = 4,323,681.20/1,909.29
  6. Step 6: Final answer
    x = 2,264.55

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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.