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Finding the Fourth Proportional to 404,731.20, 607,485.60 and 205,276.80

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Solution

The fourth proportional to 404,731.20, 607,485.60 and 205,276.80 is: 308,112.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,731.20 : 607,485.60 = 205,276.80 : x
  2. Step 2: Convert to fraction form
    404,731.20/607,485.60 = 205,276.80/x
  3. Step 3: Cross multiply
    404,731.20x = 607,485.60 × 205,276.80
  4. Step 4: Simplify right side
    404,731.20x = 124,702,700,014.08
  5. Step 5: Solve for x
    x = 124,702,700,014.08/404,731.20
  6. Step 6: Final answer
    x = 308,112.40

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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.