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Finding the Fourth Proportional to 3,123.99, 4,686.80 and 1,480.50

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Solution

The fourth proportional to 3,123.99, 4,686.80 and 1,480.50 is: 2,221.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,123.99 : 4,686.80 = 1,480.50 : x
  2. Step 2: Convert to fraction form
    3,123.99/4,686.80 = 1,480.50/x
  3. Step 3: Cross multiply
    3,123.99x = 4,686.80 × 1,480.50
  4. Step 4: Simplify right side
    3,123.99x = 6,938,800.00
  5. Step 5: Solve for x
    x = 6,938,800.00/3,123.99
  6. Step 6: Final answer
    x = 2,221.13

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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.