Home / 1,909.69-2,635.47-1,123.99

Finding the Fourth Proportional to 1,909.69, 2,635.47 and 1,123.99

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Solution

The fourth proportional to 1,909.69, 2,635.47 and 1,123.99 is: 1,551.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,909.69 : 2,635.47 = 1,123.99 : x
  2. Step 2: Convert to fraction form
    1,909.69/2,635.47 = 1,123.99/x
  3. Step 3: Cross multiply
    1,909.69x = 2,635.47 × 1,123.99
  4. Step 4: Simplify right side
    1,909.69x = 2,962,235.34
  5. Step 5: Solve for x
    x = 2,962,235.34/1,909.69
  6. Step 6: Final answer
    x = 1,551.16

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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.