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Finding the Fourth Proportional to 638,641.22, 881,384.01 and 366,744.74

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Solution

The fourth proportional to 638,641.22, 881,384.01 and 366,744.74 is: 506,141.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,641.22 : 881,384.01 = 366,744.74 : x
  2. Step 2: Convert to fraction form
    638,641.22/881,384.01 = 366,744.74/x
  3. Step 3: Cross multiply
    638,641.22x = 881,384.01 × 366,744.74
  4. Step 4: Simplify right side
    638,641.22x = 323,242,949,587.61
  5. Step 5: Solve for x
    x = 323,242,949,587.61/638,641.22
  6. Step 6: Final answer
    x = 506,141.69

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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.