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Finding the Fourth Proportional to 620,748.60, 930,904.20 and 221,402.40

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Solution

The fourth proportional to 620,748.60, 930,904.20 and 221,402.40 is: 332,025.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,748.60 : 930,904.20 = 221,402.40 : x
  2. Step 2: Convert to fraction form
    620,748.60/930,904.20 = 221,402.40/x
  3. Step 3: Cross multiply
    620,748.60x = 930,904.20 × 221,402.40
  4. Step 4: Simplify right side
    620,748.60x = 206,104,424,050.08
  5. Step 5: Solve for x
    x = 206,104,424,050.08/620,748.60
  6. Step 6: Final answer
    x = 332,025.60

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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.