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Finding the Fourth Proportional to 393,307.85, 544,820.45 and 385,336.24

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Solution

The fourth proportional to 393,307.85, 544,820.45 and 385,336.24 is: 533,777.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,307.85 : 544,820.45 = 385,336.24 : x
  2. Step 2: Convert to fraction form
    393,307.85/544,820.45 = 385,336.24/x
  3. Step 3: Cross multiply
    393,307.85x = 544,820.45 × 385,336.24
  4. Step 4: Simplify right side
    393,307.85x = 209,939,060,389.38
  5. Step 5: Solve for x
    x = 209,939,060,389.38/393,307.85
  6. Step 6: Final answer
    x = 533,777.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.