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Finding the Fourth Proportional to 311,323.80, 466,985.70 and 305,418.90

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Solution

The fourth proportional to 311,323.80, 466,985.70 and 305,418.90 is: 458,128.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,323.80 : 466,985.70 = 305,418.90 : x
  2. Step 2: Convert to fraction form
    311,323.80/466,985.70 = 305,418.90/x
  3. Step 3: Cross multiply
    311,323.80x = 466,985.70 × 305,418.90
  4. Step 4: Simplify right side
    311,323.80x = 142,626,258,809.73
  5. Step 5: Solve for x
    x = 142,626,258,809.73/311,323.80
  6. Step 6: Final answer
    x = 458,128.35

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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.