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Finding the Fourth Proportional to 639,607.86, 882,656.39 and 353,125.84

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Solution

The fourth proportional to 639,607.86, 882,656.39 and 353,125.84 is: 487,312.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,607.86 : 882,656.39 = 353,125.84 : x
  2. Step 2: Convert to fraction form
    639,607.86/882,656.39 = 353,125.84/x
  3. Step 3: Cross multiply
    639,607.86x = 882,656.39 × 353,125.84
  4. Step 4: Simplify right side
    639,607.86x = 311,688,777,384.49
  5. Step 5: Solve for x
    x = 311,688,777,384.49/639,607.86
  6. Step 6: Final answer
    x = 487,312.30

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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.