Home / 3,420.48-5,130.36-921.93

Finding the Fourth Proportional to 3,420.48, 5,130.36 and 921.93

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Solution

The fourth proportional to 3,420.48, 5,130.36 and 921.93 is: 1,382.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,420.48 : 5,130.36 = 921.93 : x
  2. Step 2: Convert to fraction form
    3,420.48/5,130.36 = 921.93/x
  3. Step 3: Cross multiply
    3,420.48x = 5,130.36 × 921.93
  4. Step 4: Simplify right side
    3,420.48x = 4,729,832.79
  5. Step 5: Solve for x
    x = 4,729,832.79/3,420.48
  6. Step 6: Final answer
    x = 1,382.80

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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.