Home / 538,389-742,976.85-312,165.72

Finding the Fourth Proportional to 538,389, 742,976.85 and 312,165.72

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Solution

The fourth proportional to 538,389, 742,976.85 and 312,165.72 is: 430,788.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,389 : 742,976.85 = 312,165.72 : x
  2. Step 2: Convert to fraction form
    538,389/742,976.85 = 312,165.72/x
  3. Step 3: Cross multiply
    538,389x = 742,976.85 × 312,165.72
  4. Step 4: Simplify right side
    538,389x = 231,931,903,323.58
  5. Step 5: Solve for x
    x = 231,931,903,323.58/538,389
  6. Step 6: Final answer
    x = 430,788.71

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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.