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Finding the Fourth Proportional to 623,618.80, 860,619 and 348,000.76

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Solution

The fourth proportional to 623,618.80, 860,619 and 348,000.76 is: 480,255.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,618.80 : 860,619 = 348,000.76 : x
  2. Step 2: Convert to fraction form
    623,618.80/860,619 = 348,000.76/x
  3. Step 3: Cross multiply
    623,618.80x = 860,619 × 348,000.76
  4. Step 4: Simplify right side
    623,618.80x = 299,496,066,070.44
  5. Step 5: Solve for x
    x = 299,496,066,070.44/623,618.80
  6. Step 6: Final answer
    x = 480,255.03

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Half scale
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Double scale
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Similar ratio
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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.