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Finding the Fourth Proportional to 570,612.80, 856,533.60 and 321,780.80

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Solution

The fourth proportional to 570,612.80, 856,533.60 and 321,780.80 is: 483,017.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,612.80 : 856,533.60 = 321,780.80 : x
  2. Step 2: Convert to fraction form
    570,612.80/856,533.60 = 321,780.80/x
  3. Step 3: Cross multiply
    570,612.80x = 856,533.60 × 321,780.80
  4. Step 4: Simplify right side
    570,612.80x = 275,616,067,034.88
  5. Step 5: Solve for x
    x = 275,616,067,034.88/570,612.80
  6. Step 6: Final answer
    x = 483,017.67

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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.