Home / 685,770.18-946,378.20-391,414.04

Finding the Fourth Proportional to 685,770.18, 946,378.20 and 391,414.04

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Solution

The fourth proportional to 685,770.18, 946,378.20 and 391,414.04 is: 540,160.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,770.18 : 946,378.20 = 391,414.04 : x
  2. Step 2: Convert to fraction form
    685,770.18/946,378.20 = 391,414.04/x
  3. Step 3: Cross multiply
    685,770.18x = 946,378.20 × 391,414.04
  4. Step 4: Simplify right side
    685,770.18x = 370,425,709,898.04
  5. Step 5: Solve for x
    x = 370,425,709,898.04/685,770.18
  6. Step 6: Final answer
    x = 540,160.13

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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.