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Finding the Fourth Proportional to 548,465.40, 821,814.90 and 311,102.20

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Solution

The fourth proportional to 548,465.40, 821,814.90 and 311,102.20 is: 466,152.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,465.40 : 821,814.90 = 311,102.20 : x
  2. Step 2: Convert to fraction form
    548,465.40/821,814.90 = 311,102.20/x
  3. Step 3: Cross multiply
    548,465.40x = 821,814.90 × 311,102.20
  4. Step 4: Simplify right side
    548,465.40x = 255,668,423,382.78
  5. Step 5: Solve for x
    x = 255,668,423,382.78/548,465.40
  6. Step 6: Final answer
    x = 466,152.33

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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.