Home / 400,840.40-553,159.89-219,555.36

Finding the Fourth Proportional to 400,840.40, 553,159.89 and 219,555.36

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Solution

The fourth proportional to 400,840.40, 553,159.89 and 219,555.36 is: 302,986.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,840.40 : 553,159.89 = 219,555.36 : x
  2. Step 2: Convert to fraction form
    400,840.40/553,159.89 = 219,555.36/x
  3. Step 3: Cross multiply
    400,840.40x = 553,159.89 × 219,555.36
  4. Step 4: Simplify right side
    400,840.40x = 121,449,218,786.51
  5. Step 5: Solve for x
    x = 121,449,218,786.51/400,840.40
  6. Step 6: Final answer
    x = 302,986.47

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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.