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Finding the Fourth Proportional to 655,867.80, 983,801.70 and 389,491.20

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Solution

The fourth proportional to 655,867.80, 983,801.70 and 389,491.20 is: 584,236.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,867.80 : 983,801.70 = 389,491.20 : x
  2. Step 2: Convert to fraction form
    655,867.80/983,801.70 = 389,491.20/x
  3. Step 3: Cross multiply
    655,867.80x = 983,801.70 × 389,491.20
  4. Step 4: Simplify right side
    655,867.80x = 383,182,104,695.04
  5. Step 5: Solve for x
    x = 383,182,104,695.04/655,867.80
  6. Step 6: Final answer
    x = 584,236.80

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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.