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Finding the Fourth Proportional to 620,405.70, 930,608.55 and 265,455.60

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Solution

The fourth proportional to 620,405.70, 930,608.55 and 265,455.60 is: 398,183.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,405.70 : 930,608.55 = 265,455.60 : x
  2. Step 2: Convert to fraction form
    620,405.70/930,608.55 = 265,455.60/x
  3. Step 3: Cross multiply
    620,405.70x = 930,608.55 × 265,455.60
  4. Step 4: Simplify right side
    620,405.70x = 247,035,251,005.38
  5. Step 5: Solve for x
    x = 247,035,251,005.38/620,405.70
  6. Step 6: Final answer
    x = 398,183.40

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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.