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Finding the Fourth Proportional to 648,909.70, 973,364.55 and 383,189.20

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Solution

The fourth proportional to 648,909.70, 973,364.55 and 383,189.20 is: 574,783.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,909.70 : 973,364.55 = 383,189.20 : x
  2. Step 2: Convert to fraction form
    648,909.70/973,364.55 = 383,189.20/x
  3. Step 3: Cross multiply
    648,909.70x = 973,364.55 × 383,189.20
  4. Step 4: Simplify right side
    648,909.70x = 372,982,783,222.86
  5. Step 5: Solve for x
    x = 372,982,783,222.86/648,909.70
  6. Step 6: Final answer
    x = 574,783.80

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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.