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Finding the Fourth Proportional to 623,274.12, 860,518.60 and 391,019.47

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Solution

The fourth proportional to 623,274.12, 860,518.60 and 391,019.47 is: 539,858.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,274.12 : 860,518.60 = 391,019.47 : x
  2. Step 2: Convert to fraction form
    623,274.12/860,518.60 = 391,019.47/x
  3. Step 3: Cross multiply
    623,274.12x = 860,518.60 × 391,019.47
  4. Step 4: Simplify right side
    623,274.12x = 336,479,523,768.30
  5. Step 5: Solve for x
    x = 336,479,523,768.30/623,274.12
  6. Step 6: Final answer
    x = 539,858.01

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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.