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Finding the Fourth Proportional to 655,421.70, 983,132.55 and 445,469.70

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Solution

The fourth proportional to 655,421.70, 983,132.55 and 445,469.70 is: 668,204.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,421.70 : 983,132.55 = 445,469.70 : x
  2. Step 2: Convert to fraction form
    655,421.70/983,132.55 = 445,469.70/x
  3. Step 3: Cross multiply
    655,421.70x = 983,132.55 × 445,469.70
  4. Step 4: Simplify right side
    655,421.70x = 437,955,762,108.74
  5. Step 5: Solve for x
    x = 437,955,762,108.74/655,421.70
  6. Step 6: Final answer
    x = 668,204.55

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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.