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Finding the Fourth Proportional to 312,004.80, 468,007.20 and 259,516.80

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Solution

The fourth proportional to 312,004.80, 468,007.20 and 259,516.80 is: 389,275.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,004.80 : 468,007.20 = 259,516.80 : x
  2. Step 2: Convert to fraction form
    312,004.80/468,007.20 = 259,516.80/x
  3. Step 3: Cross multiply
    312,004.80x = 468,007.20 × 259,516.80
  4. Step 4: Simplify right side
    312,004.80x = 121,455,730,920.96
  5. Step 5: Solve for x
    x = 121,455,730,920.96/312,004.80
  6. Step 6: Final answer
    x = 389,275.20

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1.5x scale

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.