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Finding the Fourth Proportional to 281,438.55, 388,388.34 and 152,379.81

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Solution

The fourth proportional to 281,438.55, 388,388.34 and 152,379.81 is: 210,285.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,438.55 : 388,388.34 = 152,379.81 : x
  2. Step 2: Convert to fraction form
    281,438.55/388,388.34 = 152,379.81/x
  3. Step 3: Cross multiply
    281,438.55x = 388,388.34 × 152,379.81
  4. Step 4: Simplify right side
    281,438.55x = 59,182,541,455.42
  5. Step 5: Solve for x
    x = 59,182,541,455.42/281,438.55
  6. Step 6: Final answer
    x = 210,285.84

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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.