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Finding the Fourth Proportional to 638,193.78, 880,695.54 and 347,807.64

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Solution

The fourth proportional to 638,193.78, 880,695.54 and 347,807.64 is: 479,968.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,193.78 : 880,695.54 = 347,807.64 : x
  2. Step 2: Convert to fraction form
    638,193.78/880,695.54 = 347,807.64/x
  3. Step 3: Cross multiply
    638,193.78x = 880,695.54 × 347,807.64
  4. Step 4: Simplify right side
    638,193.78x = 306,312,637,325.93
  5. Step 5: Solve for x
    x = 306,312,637,325.93/638,193.78
  6. Step 6: Final answer
    x = 479,968.07

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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.