Home / 1,151.02-1,726.53-420.31

Finding the Fourth Proportional to 1,151.02, 1,726.53 and 420.31

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Solution

The fourth proportional to 1,151.02, 1,726.53 and 420.31 is: 630.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,151.02 : 1,726.53 = 420.31 : x
  2. Step 2: Convert to fraction form
    1,151.02/1,726.53 = 420.31/x
  3. Step 3: Cross multiply
    1,151.02x = 1,726.53 × 420.31
  4. Step 4: Simplify right side
    1,151.02x = 725,669.19
  5. Step 5: Solve for x
    x = 725,669.19/1,151.02
  6. Step 6: Final answer
    x = 630.46

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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.