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Finding the Fourth Proportional to 685,973.88, 946,751.90 and 391,624.34

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Solution

The fourth proportional to 685,973.88, 946,751.90 and 391,624.34 is: 540,503.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,973.88 : 946,751.90 = 391,624.34 : x
  2. Step 2: Convert to fraction form
    685,973.88/946,751.90 = 391,624.34/x
  3. Step 3: Cross multiply
    685,973.88x = 946,751.90 × 391,624.34
  4. Step 4: Simplify right side
    685,973.88x = 370,771,081,289.37
  5. Step 5: Solve for x
    x = 370,771,081,289.37/685,973.88
  6. Step 6: Final answer
    x = 540,503.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.