Home / 2,289.50-3,159.68-1,405.58

Finding the Fourth Proportional to 2,289.50, 3,159.68 and 1,405.58

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Solution

The fourth proportional to 2,289.50, 3,159.68 and 1,405.58 is: 1,939.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,289.50 : 3,159.68 = 1,405.58 : x
  2. Step 2: Convert to fraction form
    2,289.50/3,159.68 = 1,405.58/x
  3. Step 3: Cross multiply
    2,289.50x = 3,159.68 × 1,405.58
  4. Step 4: Simplify right side
    2,289.50x = 4,441,160.19
  5. Step 5: Solve for x
    x = 4,441,160.19/2,289.50
  6. Step 6: Final answer
    x = 1,939.80

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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.