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Finding the Fourth Proportional to 639,437.72, 882,424.14 and 352,957.86

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Solution

The fourth proportional to 639,437.72, 882,424.14 and 352,957.86 is: 487,081.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,437.72 : 882,424.14 = 352,957.86 : x
  2. Step 2: Convert to fraction form
    639,437.72/882,424.14 = 352,957.86/x
  3. Step 3: Cross multiply
    639,437.72x = 882,424.14 × 352,957.86
  4. Step 4: Simplify right side
    639,437.72x = 311,458,536,066.74
  5. Step 5: Solve for x
    x = 311,458,536,066.74/639,437.72
  6. Step 6: Final answer
    x = 487,081.89

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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.