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Finding the Fourth Proportional to 685,868.95, 946,488.90 and 379,944.42

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Solution

The fourth proportional to 685,868.95, 946,488.90 and 379,944.42 is: 524,317.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,868.95 : 946,488.90 = 379,944.42 : x
  2. Step 2: Convert to fraction form
    685,868.95/946,488.90 = 379,944.42/x
  3. Step 3: Cross multiply
    685,868.95x = 946,488.90 × 379,944.42
  4. Step 4: Simplify right side
    685,868.95x = 359,613,176,146.94
  5. Step 5: Solve for x
    x = 359,613,176,146.94/685,868.95
  6. Step 6: Final answer
    x = 524,317.62

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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.