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Finding the Fourth Proportional to 257,933.80, 386,900.70 and 163,455.40

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Solution

The fourth proportional to 257,933.80, 386,900.70 and 163,455.40 is: 245,183.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,933.80 : 386,900.70 = 163,455.40 : x
  2. Step 2: Convert to fraction form
    257,933.80/386,900.70 = 163,455.40/x
  3. Step 3: Cross multiply
    257,933.80x = 386,900.70 × 163,455.40
  4. Step 4: Simplify right side
    257,933.80x = 63,241,008,678.78
  5. Step 5: Solve for x
    x = 63,241,008,678.78/257,933.80
  6. Step 6: Final answer
    x = 245,183.10

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1.5x scale

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.