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Finding the Fourth Proportional to 386,369.68, 533,189.80 and 216,603.84

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Solution

The fourth proportional to 386,369.68, 533,189.80 and 216,603.84 is: 298,913.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,369.68 : 533,189.80 = 216,603.84 : x
  2. Step 2: Convert to fraction form
    386,369.68/533,189.80 = 216,603.84/x
  3. Step 3: Cross multiply
    386,369.68x = 533,189.80 × 216,603.84
  4. Step 4: Simplify right side
    386,369.68x = 115,490,958,128.83
  5. Step 5: Solve for x
    x = 115,490,958,128.83/386,369.68
  6. Step 6: Final answer
    x = 298,913.10

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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.