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Finding the Fourth Proportional to 343,785.60, 515,678.40 and 238,809.60

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Solution

The fourth proportional to 343,785.60, 515,678.40 and 238,809.60 is: 358,214.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,785.60 : 515,678.40 = 238,809.60 : x
  2. Step 2: Convert to fraction form
    343,785.60/515,678.40 = 238,809.60/x
  3. Step 3: Cross multiply
    343,785.60x = 515,678.40 × 238,809.60
  4. Step 4: Simplify right side
    343,785.60x = 123,148,952,432.64
  5. Step 5: Solve for x
    x = 123,148,952,432.64/343,785.60
  6. Step 6: Final answer
    x = 358,214.40

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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.