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Finding the Fourth Proportional to 318,501.86, 477,756.50 and 126,423.45

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Solution

The fourth proportional to 318,501.86, 477,756.50 and 126,423.45 is: 189,636.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,501.86 : 477,756.50 = 126,423.45 : x
  2. Step 2: Convert to fraction form
    318,501.86/477,756.50 = 126,423.45/x
  3. Step 3: Cross multiply
    318,501.86x = 477,756.50 × 126,423.45
  4. Step 4: Simplify right side
    318,501.86x = 60,399,624,357.81
  5. Step 5: Solve for x
    x = 60,399,624,357.81/318,501.86
  6. Step 6: Final answer
    x = 189,636.65

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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.