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Finding the Fourth Proportional to 648,209.05, 894,421.51 and 361,728.45

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Solution

The fourth proportional to 648,209.05, 894,421.51 and 361,728.45 is: 499,125.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,209.05 : 894,421.51 = 361,728.45 : x
  2. Step 2: Convert to fraction form
    648,209.05/894,421.51 = 361,728.45/x
  3. Step 3: Cross multiply
    648,209.05x = 894,421.51 × 361,728.45
  4. Step 4: Simplify right side
    648,209.05x = 323,537,705,554.64
  5. Step 5: Solve for x
    x = 323,537,705,554.64/648,209.05
  6. Step 6: Final answer
    x = 499,125.56

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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.