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Finding the Fourth Proportional to 388,372.80, 535,678.40 and 259,246.24

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Solution

The fourth proportional to 388,372.80, 535,678.40 and 259,246.24 is: 357,575.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,372.80 : 535,678.40 = 259,246.24 : x
  2. Step 2: Convert to fraction form
    388,372.80/535,678.40 = 259,246.24/x
  3. Step 3: Cross multiply
    388,372.80x = 535,678.40 × 259,246.24
  4. Step 4: Simplify right side
    388,372.80x = 138,872,611,049.22
  5. Step 5: Solve for x
    x = 138,872,611,049.22/388,372.80
  6. Step 6: Final answer
    x = 357,575.53

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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.