Home / 1,243.00-1,864.98-421.27

Finding the Fourth Proportional to 1,243.00, 1,864.98 and 421.27

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Solution

The fourth proportional to 1,243.00, 1,864.98 and 421.27 is: 632.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,243.00 : 1,864.98 = 421.27 : x
  2. Step 2: Convert to fraction form
    1,243.00/1,864.98 = 421.27/x
  3. Step 3: Cross multiply
    1,243.00x = 1,864.98 × 421.27
  4. Step 4: Simplify right side
    1,243.00x = 785,666.26
  5. Step 5: Solve for x
    x = 785,666.26/1,243.00
  6. Step 6: Final answer
    x = 632.07

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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.