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Finding the Fourth Proportional to 540,315.28, 809,748.42 and 420,516.87

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Solution

The fourth proportional to 540,315.28, 809,748.42 and 420,516.87 is: 630,211.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    540,315.28 : 809,748.42 = 420,516.87 : x
  2. Step 2: Convert to fraction form
    540,315.28/809,748.42 = 420,516.87/x
  3. Step 3: Cross multiply
    540,315.28x = 809,748.42 × 420,516.87
  4. Step 4: Simplify right side
    540,315.28x = 340,512,871,065.85
  5. Step 5: Solve for x
    x = 340,512,871,065.85/540,315.28
  6. Step 6: Final answer
    x = 630,211.44

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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.