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Finding the Fourth Proportional to 638,518.40, 957,009.60 and 264,348.80

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Solution

The fourth proportional to 638,518.40, 957,009.60 and 264,348.80 is: 396,205.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,518.40 : 957,009.60 = 264,348.80 : x
  2. Step 2: Convert to fraction form
    638,518.40/957,009.60 = 264,348.80/x
  3. Step 3: Cross multiply
    638,518.40x = 957,009.60 × 264,348.80
  4. Step 4: Simplify right side
    638,518.40x = 252,984,339,348.48
  5. Step 5: Solve for x
    x = 252,984,339,348.48/638,518.40
  6. Step 6: Final answer
    x = 396,205.25

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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.