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Finding the Fourth Proportional to 497,000.76, 685,820.60 and 279,197.58

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Solution

The fourth proportional to 497,000.76, 685,820.60 and 279,197.58 is: 385,269.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    497,000.76 : 685,820.60 = 279,197.58 : x
  2. Step 2: Convert to fraction form
    497,000.76/685,820.60 = 279,197.58/x
  3. Step 3: Cross multiply
    497,000.76x = 685,820.60 × 279,197.58
  4. Step 4: Simplify right side
    497,000.76x = 191,479,453,271.74
  5. Step 5: Solve for x
    x = 191,479,453,271.74/497,000.76
  6. Step 6: Final answer
    x = 385,269.94

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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.