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Finding the Fourth Proportional to 655,984.32, 983,131.64 and 318,371.62

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Solution

The fourth proportional to 655,984.32, 983,131.64 and 318,371.62 is: 477,147.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,984.32 : 983,131.64 = 318,371.62 : x
  2. Step 2: Convert to fraction form
    655,984.32/983,131.64 = 318,371.62/x
  3. Step 3: Cross multiply
    655,984.32x = 983,131.64 × 318,371.62
  4. Step 4: Simplify right side
    655,984.32x = 313,001,212,900.06
  5. Step 5: Solve for x
    x = 313,001,212,900.06/655,984.32
  6. Step 6: Final answer
    x = 477,147.40

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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.