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Finding the Fourth Proportional to 313,105.40, 469,273.20 and 144,391.51

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Solution

The fourth proportional to 313,105.40, 469,273.20 and 144,391.51 is: 216,409.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,105.40 : 469,273.20 = 144,391.51 : x
  2. Step 2: Convert to fraction form
    313,105.40/469,273.20 = 144,391.51/x
  3. Step 3: Cross multiply
    313,105.40x = 469,273.20 × 144,391.51
  4. Step 4: Simplify right side
    313,105.40x = 67,759,065,995.66
  5. Step 5: Solve for x
    x = 67,759,065,995.66/313,105.40
  6. Step 6: Final answer
    x = 216,409.77

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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.