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Finding the Fourth Proportional to 368,879.60, 553,319.40 and 256,905.20

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Solution

The fourth proportional to 368,879.60, 553,319.40 and 256,905.20 is: 385,357.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,879.60 : 553,319.40 = 256,905.20 : x
  2. Step 2: Convert to fraction form
    368,879.60/553,319.40 = 256,905.20/x
  3. Step 3: Cross multiply
    368,879.60x = 553,319.40 × 256,905.20
  4. Step 4: Simplify right side
    368,879.60x = 142,150,631,120.88
  5. Step 5: Solve for x
    x = 142,150,631,120.88/368,879.60
  6. Step 6: Final answer
    x = 385,357.80

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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.