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Finding the Fourth Proportional to 257,440.40, 386,160.60 and 243,006.20

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Solution

The fourth proportional to 257,440.40, 386,160.60 and 243,006.20 is: 364,509.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,440.40 : 386,160.60 = 243,006.20 : x
  2. Step 2: Convert to fraction form
    257,440.40/386,160.60 = 243,006.20/x
  3. Step 3: Cross multiply
    257,440.40x = 386,160.60 × 243,006.20
  4. Step 4: Simplify right side
    257,440.40x = 93,839,419,995.72
  5. Step 5: Solve for x
    x = 93,839,419,995.72/257,440.40
  6. Step 6: Final answer
    x = 364,509.30

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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.