Home / 3,123.48-4,683.96-1,390.92

Finding the Fourth Proportional to 3,123.48, 4,683.96 and 1,390.92

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Solution

The fourth proportional to 3,123.48, 4,683.96 and 1,390.92 is: 2,085.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,123.48 : 4,683.96 = 1,390.92 : x
  2. Step 2: Convert to fraction form
    3,123.48/4,683.96 = 1,390.92/x
  3. Step 3: Cross multiply
    3,123.48x = 4,683.96 × 1,390.92
  4. Step 4: Simplify right side
    3,123.48x = 6,515,013.64
  5. Step 5: Solve for x
    x = 6,515,013.64/3,123.48
  6. Step 6: Final answer
    x = 2,085.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.