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Finding the Fourth Proportional to 559,969.30, 839,953.95 and 420,001.30

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Solution

The fourth proportional to 559,969.30, 839,953.95 and 420,001.30 is: 630,001.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,969.30 : 839,953.95 = 420,001.30 : x
  2. Step 2: Convert to fraction form
    559,969.30/839,953.95 = 420,001.30/x
  3. Step 3: Cross multiply
    559,969.30x = 839,953.95 × 420,001.30
  4. Step 4: Simplify right side
    559,969.30x = 352,781,750,940.14
  5. Step 5: Solve for x
    x = 352,781,750,940.14/559,969.30
  6. Step 6: Final answer
    x = 630,001.95

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.