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Finding the Fourth Proportional to 257,807.21, 355,768.56 and 143,079.17

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Solution

The fourth proportional to 257,807.21, 355,768.56 and 143,079.17 is: 197,446.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,807.21 : 355,768.56 = 143,079.17 : x
  2. Step 2: Convert to fraction form
    257,807.21/355,768.56 = 143,079.17/x
  3. Step 3: Cross multiply
    257,807.21x = 355,768.56 × 143,079.17
  4. Step 4: Simplify right side
    257,807.21x = 50,903,068,498.05
  5. Step 5: Solve for x
    x = 50,903,068,498.05/257,807.21
  6. Step 6: Final answer
    x = 197,446.26

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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.