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Finding the Fourth Proportional to 548,419.20, 822,628.80 and 478,435.20

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Solution

The fourth proportional to 548,419.20, 822,628.80 and 478,435.20 is: 717,652.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,419.20 : 822,628.80 = 478,435.20 : x
  2. Step 2: Convert to fraction form
    548,419.20/822,628.80 = 478,435.20/x
  3. Step 3: Cross multiply
    548,419.20x = 822,628.80 × 478,435.20
  4. Step 4: Simplify right side
    548,419.20x = 393,574,574,453.76
  5. Step 5: Solve for x
    x = 393,574,574,453.76/548,419.20
  6. Step 6: Final answer
    x = 717,652.80

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Similar ratio
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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.