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Finding the Fourth Proportional to 659,312.80, 988,969.20 and 446,736.40

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Solution

The fourth proportional to 659,312.80, 988,969.20 and 446,736.40 is: 670,104.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,312.80 : 988,969.20 = 446,736.40 : x
  2. Step 2: Convert to fraction form
    659,312.80/988,969.20 = 446,736.40/x
  3. Step 3: Cross multiply
    659,312.80x = 988,969.20 × 446,736.40
  4. Step 4: Simplify right side
    659,312.80x = 441,808,540,118.88
  5. Step 5: Solve for x
    x = 441,808,540,118.88/659,312.80
  6. Step 6: Final answer
    x = 670,104.60

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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.