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Finding the Fourth Proportional to 683,642.63, 943,445.85 and 377,738.72

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Solution

The fourth proportional to 683,642.63, 943,445.85 and 377,738.72 is: 521,289.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    683,642.63 : 943,445.85 = 377,738.72 : x
  2. Step 2: Convert to fraction form
    683,642.63/943,445.85 = 377,738.72/x
  3. Step 3: Cross multiply
    683,642.63x = 943,445.85 × 377,738.72
  4. Step 4: Simplify right side
    683,642.63x = 356,376,023,051.08
  5. Step 5: Solve for x
    x = 356,376,023,051.08/683,642.63
  6. Step 6: Final answer
    x = 521,289.94

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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.