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Finding the Fourth Proportional to 318,312.75, 477,367.69 and 105,040.91

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Solution

The fourth proportional to 318,312.75, 477,367.69 and 105,040.91 is: 157,527.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,312.75 : 477,367.69 = 105,040.91 : x
  2. Step 2: Convert to fraction form
    318,312.75/477,367.69 = 105,040.91/x
  3. Step 3: Cross multiply
    318,312.75x = 477,367.69 × 105,040.91
  4. Step 4: Simplify right side
    318,312.75x = 50,143,137,493.01
  5. Step 5: Solve for x
    x = 50,143,137,493.01/318,312.75
  6. Step 6: Final answer
    x = 157,527.90

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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.