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Finding the Fourth Proportional to 620,766.60, 930,931.20 and 221,420.40

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Solution

The fourth proportional to 620,766.60, 930,931.20 and 221,420.40 is: 332,052.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,766.60 : 930,931.20 = 221,420.40 : x
  2. Step 2: Convert to fraction form
    620,766.60/930,931.20 = 221,420.40/x
  3. Step 3: Cross multiply
    620,766.60x = 930,931.20 × 221,420.40
  4. Step 4: Simplify right side
    620,766.60x = 206,127,158,676.48
  5. Step 5: Solve for x
    x = 206,127,158,676.48/620,766.60
  6. Step 6: Final answer
    x = 332,052.59

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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.