Home / 420,030.81-579,640.19-229,040.10

Finding the Fourth Proportional to 420,030.81, 579,640.19 and 229,040.10

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Solution

The fourth proportional to 420,030.81, 579,640.19 and 229,040.10 is: 316,074.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,030.81 : 579,640.19 = 229,040.10 : x
  2. Step 2: Convert to fraction form
    420,030.81/579,640.19 = 229,040.10/x
  3. Step 3: Cross multiply
    420,030.81x = 579,640.19 × 229,040.10
  4. Step 4: Simplify right side
    420,030.81x = 132,760,845,936.42
  5. Step 5: Solve for x
    x = 132,760,845,936.42/420,030.81
  6. Step 6: Final answer
    x = 316,074.07

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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.