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Finding the Fourth Proportional to 426,980.80, 589,212.31 and 235,989.28

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Solution

The fourth proportional to 426,980.80, 589,212.31 and 235,989.28 is: 325,653.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,980.80 : 589,212.31 = 235,989.28 : x
  2. Step 2: Convert to fraction form
    426,980.80/589,212.31 = 235,989.28/x
  3. Step 3: Cross multiply
    426,980.80x = 589,212.31 × 235,989.28
  4. Step 4: Simplify right side
    426,980.80x = 139,047,788,804.04
  5. Step 5: Solve for x
    x = 139,047,788,804.04/426,980.80
  6. Step 6: Final answer
    x = 325,653.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.