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Finding the Fourth Proportional to 620,604.60, 930,688.20 and 221,258.40

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Solution

The fourth proportional to 620,604.60, 930,688.20 and 221,258.40 is: 331,809.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,604.60 : 930,688.20 = 221,258.40 : x
  2. Step 2: Convert to fraction form
    620,604.60/930,688.20 = 221,258.40/x
  3. Step 3: Cross multiply
    620,604.60x = 930,688.20 × 221,258.40
  4. Step 4: Simplify right side
    620,604.60x = 205,922,582,030.88
  5. Step 5: Solve for x
    x = 205,922,582,030.88/620,604.60
  6. Step 6: Final answer
    x = 331,809.63

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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.