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Finding the Fourth Proportional to 611,480.45, 917,383.34 and 212,120.60

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Solution

The fourth proportional to 611,480.45, 917,383.34 and 212,120.60 is: 318,237.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,480.45 : 917,383.34 = 212,120.60 : x
  2. Step 2: Convert to fraction form
    611,480.45/917,383.34 = 212,120.60/x
  3. Step 3: Cross multiply
    611,480.45x = 917,383.34 × 212,120.60
  4. Step 4: Simplify right side
    611,480.45x = 194,595,900,454.19
  5. Step 5: Solve for x
    x = 194,595,900,454.19/611,480.45
  6. Step 6: Final answer
    x = 318,237.32

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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.