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Finding the Fourth Proportional to 648,907.70, 973,361.55 and 383,187.20

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Solution

The fourth proportional to 648,907.70, 973,361.55 and 383,187.20 is: 574,780.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,907.70 : 973,361.55 = 383,187.20 : x
  2. Step 2: Convert to fraction form
    648,907.70/973,361.55 = 383,187.20/x
  3. Step 3: Cross multiply
    648,907.70x = 973,361.55 × 383,187.20
  4. Step 4: Simplify right side
    648,907.70x = 372,979,686,932.16
  5. Step 5: Solve for x
    x = 372,979,686,932.16/648,907.70
  6. Step 6: Final answer
    x = 574,780.80

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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.