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Finding the Fourth Proportional to 638,614.84, 881,243.32 and 352,128.80

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Solution

The fourth proportional to 638,614.84, 881,243.32 and 352,128.80 is: 485,912.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,614.84 : 881,243.32 = 352,128.80 : x
  2. Step 2: Convert to fraction form
    638,614.84/881,243.32 = 352,128.80/x
  3. Step 3: Cross multiply
    638,614.84x = 881,243.32 × 352,128.80
  4. Step 4: Simplify right side
    638,614.84x = 310,311,152,779.62
  5. Step 5: Solve for x
    x = 310,311,152,779.62/638,614.84
  6. Step 6: Final answer
    x = 485,912.84

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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.