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Finding the Fourth Proportional to 313,715.80, 470,400.90 and 103,245.40

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Solution

The fourth proportional to 313,715.80, 470,400.90 and 103,245.40 is: 154,811.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,715.80 : 470,400.90 = 103,245.40 : x
  2. Step 2: Convert to fraction form
    313,715.80/470,400.90 = 103,245.40/x
  3. Step 3: Cross multiply
    313,715.80x = 470,400.90 × 103,245.40
  4. Step 4: Simplify right side
    313,715.80x = 48,566,729,080.86
  5. Step 5: Solve for x
    x = 48,566,729,080.86/313,715.80
  6. Step 6: Final answer
    x = 154,811.23

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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.