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Finding the Fourth Proportional to 310,123.40, 465,217.27 and 85,483.87

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Solution

The fourth proportional to 310,123.40, 465,217.27 and 85,483.87 is: 128,234.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,123.40 : 465,217.27 = 85,483.87 : x
  2. Step 2: Convert to fraction form
    310,123.40/465,217.27 = 85,483.87/x
  3. Step 3: Cross multiply
    310,123.40x = 465,217.27 × 85,483.87
  4. Step 4: Simplify right side
    310,123.40x = 39,768,571,253.68
  5. Step 5: Solve for x
    x = 39,768,571,253.68/310,123.40
  6. Step 6: Final answer
    x = 128,234.67

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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.