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Finding the Fourth Proportional to 611,990.60, 917,986.62 and 191,268.68

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Solution

The fourth proportional to 611,990.60, 917,986.62 and 191,268.68 is: 286,903.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,990.60 : 917,986.62 = 191,268.68 : x
  2. Step 2: Convert to fraction form
    611,990.60/917,986.62 = 191,268.68/x
  3. Step 3: Cross multiply
    611,990.60x = 917,986.62 × 191,268.68
  4. Step 4: Simplify right side
    611,990.60x = 175,582,089,065.06
  5. Step 5: Solve for x
    x = 175,582,089,065.06/611,990.60
  6. Step 6: Final answer
    x = 286,903.25

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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.