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Finding the Fourth Proportional to 281,439.55, 388,389.72 and 152,380.81

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Solution

The fourth proportional to 281,439.55, 388,389.72 and 152,380.81 is: 210,287.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,439.55 : 388,389.72 = 152,380.81 : x
  2. Step 2: Convert to fraction form
    281,439.55/388,389.72 = 152,380.81/x
  3. Step 3: Cross multiply
    281,439.55x = 388,389.72 × 152,380.81
  4. Step 4: Simplify right side
    281,439.55x = 59,183,140,129.27
  5. Step 5: Solve for x
    x = 59,183,140,129.27/281,439.55
  6. Step 6: Final answer
    x = 210,287.22

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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.