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Finding the Fourth Proportional to 550,728.68, 759,958.98 and 308,978.60

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Solution

The fourth proportional to 550,728.68, 759,958.98 and 308,978.60 is: 426,364.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    550,728.68 : 759,958.98 = 308,978.60 : x
  2. Step 2: Convert to fraction form
    550,728.68/759,958.98 = 308,978.60/x
  3. Step 3: Cross multiply
    550,728.68x = 759,958.98 × 308,978.60
  4. Step 4: Simplify right side
    550,728.68x = 234,811,061,697.83
  5. Step 5: Solve for x
    x = 234,811,061,697.83/550,728.68
  6. Step 6: Final answer
    x = 426,364.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.