Home / 1,475.76-2,199.75-1,428.60

Finding the Fourth Proportional to 1,475.76, 2,199.75 and 1,428.60

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Solution

The fourth proportional to 1,475.76, 2,199.75 and 1,428.60 is: 2,129.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,475.76 : 2,199.75 = 1,428.60 : x
  2. Step 2: Convert to fraction form
    1,475.76/2,199.75 = 1,428.60/x
  3. Step 3: Cross multiply
    1,475.76x = 2,199.75 × 1,428.60
  4. Step 4: Simplify right side
    1,475.76x = 3,142,562.85
  5. Step 5: Solve for x
    x = 3,142,562.85/1,475.76
  6. Step 6: Final answer
    x = 2,129.45

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.