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Finding the Fourth Proportional to 310,668.40, 465,319.68 and 256,749.40

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Solution

The fourth proportional to 310,668.40, 465,319.68 and 256,749.40 is: 384,559.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,668.40 : 465,319.68 = 256,749.40 : x
  2. Step 2: Convert to fraction form
    310,668.40/465,319.68 = 256,749.40/x
  3. Step 3: Cross multiply
    310,668.40x = 465,319.68 × 256,749.40
  4. Step 4: Simplify right side
    310,668.40x = 119,470,548,648.19
  5. Step 5: Solve for x
    x = 119,470,548,648.19/310,668.40
  6. Step 6: Final answer
    x = 384,559.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.