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Finding the Fourth Proportional to 313,485.70, 470,228.56 and 219,007.30

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Solution

The fourth proportional to 313,485.70, 470,228.56 and 219,007.30 is: 328,510.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,485.70 : 470,228.56 = 219,007.30 : x
  2. Step 2: Convert to fraction form
    313,485.70/470,228.56 = 219,007.30/x
  3. Step 3: Cross multiply
    313,485.70x = 470,228.56 × 219,007.30
  4. Step 4: Simplify right side
    313,485.70x = 102,983,487,308.49
  5. Step 5: Solve for x
    x = 102,983,487,308.49/313,485.70
  6. Step 6: Final answer
    x = 328,510.96

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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.