Home / 379,455.56-523,628.07-209,678.75

Finding the Fourth Proportional to 379,455.56, 523,628.07 and 209,678.75

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Solution

The fourth proportional to 379,455.56, 523,628.07 and 209,678.75 is: 289,345.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,455.56 : 523,628.07 = 209,678.75 : x
  2. Step 2: Convert to fraction form
    379,455.56/523,628.07 = 209,678.75/x
  3. Step 3: Cross multiply
    379,455.56x = 523,628.07 × 209,678.75
  4. Step 4: Simplify right side
    379,455.56x = 109,793,679,182.51
  5. Step 5: Solve for x
    x = 109,793,679,182.51/379,455.56
  6. Step 6: Final answer
    x = 289,345.29

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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.