Home / 1,475.76-2,021.80-1,420.40

Finding the Fourth Proportional to 1,475.76, 2,021.80 and 1,420.40

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Solution

The fourth proportional to 1,475.76, 2,021.80 and 1,420.40 is: 1,945.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,475.76 : 2,021.80 = 1,420.40 : x
  2. Step 2: Convert to fraction form
    1,475.76/2,021.80 = 1,420.40/x
  3. Step 3: Cross multiply
    1,475.76x = 2,021.80 × 1,420.40
  4. Step 4: Simplify right side
    1,475.76x = 2,871,764.72
  5. Step 5: Solve for x
    x = 2,871,764.72/1,475.76
  6. Step 6: Final answer
    x = 1,945.96

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.