Home / 420,068.36-579,739.29-256,820.65

Finding the Fourth Proportional to 420,068.36, 579,739.29 and 256,820.65

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Solution

The fourth proportional to 420,068.36, 579,739.29 and 256,820.65 is: 354,439.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,068.36 : 579,739.29 = 256,820.65 : x
  2. Step 2: Convert to fraction form
    420,068.36/579,739.29 = 256,820.65/x
  3. Step 3: Cross multiply
    420,068.36x = 579,739.29 × 256,820.65
  4. Step 4: Simplify right side
    420,068.36x = 148,889,018,389.64
  5. Step 5: Solve for x
    x = 148,889,018,389.64/420,068.36
  6. Step 6: Final answer
    x = 354,439.97

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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.