Home / 420,021.64-579,643.86-229,045.51

Finding the Fourth Proportional to 420,021.64, 579,643.86 and 229,045.51

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Solution

The fourth proportional to 420,021.64, 579,643.86 and 229,045.51 is: 316,090.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,021.64 : 579,643.86 = 229,045.51 : x
  2. Step 2: Convert to fraction form
    420,021.64/579,643.86 = 229,045.51/x
  3. Step 3: Cross multiply
    420,021.64x = 579,643.86 × 229,045.51
  4. Step 4: Simplify right side
    420,021.64x = 132,764,823,532.07
  5. Step 5: Solve for x
    x = 132,764,823,532.07/420,021.64
  6. Step 6: Final answer
    x = 316,090.44

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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.