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Finding the Fourth Proportional to 638,897.60, 881,801.16 and 384,330.80

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Solution

The fourth proportional to 638,897.60, 881,801.16 and 384,330.80 is: 530,450.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,897.60 : 881,801.16 = 384,330.80 : x
  2. Step 2: Convert to fraction form
    638,897.60/881,801.16 = 384,330.80/x
  3. Step 3: Cross multiply
    638,897.60x = 881,801.16 × 384,330.80
  4. Step 4: Simplify right side
    638,897.60x = 338,903,345,263.73
  5. Step 5: Solve for x
    x = 338,903,345,263.73/638,897.60
  6. Step 6: Final answer
    x = 530,450.18

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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.