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Finding the Fourth Proportional to 288,990.18, 398,799.45 and 161,670.33

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Solution

The fourth proportional to 288,990.18, 398,799.45 and 161,670.33 is: 223,101.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,990.18 : 398,799.45 = 161,670.33 : x
  2. Step 2: Convert to fraction form
    288,990.18/398,799.45 = 161,670.33/x
  3. Step 3: Cross multiply
    288,990.18x = 398,799.45 × 161,670.33
  4. Step 4: Simplify right side
    288,990.18x = 64,474,038,685.32
  5. Step 5: Solve for x
    x = 64,474,038,685.32/288,990.18
  6. Step 6: Final answer
    x = 223,101.14

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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.