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Finding the Fourth Proportional to 288,990.48, 398,806.74 and 161,666.04

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Solution

The fourth proportional to 288,990.48, 398,806.74 and 161,666.04 is: 223,099.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,990.48 : 398,806.74 = 161,666.04 : x
  2. Step 2: Convert to fraction form
    288,990.48/398,806.74 = 161,666.04/x
  3. Step 3: Cross multiply
    288,990.48x = 398,806.74 × 161,666.04
  4. Step 4: Simplify right side
    288,990.48x = 64,473,506,381.11
  5. Step 5: Solve for x
    x = 64,473,506,381.11/288,990.48
  6. Step 6: Final answer
    x = 223,099.07

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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.