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Finding the Fourth Proportional to 424,639.36, 637,042.56 and 140,318.44

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Solution

The fourth proportional to 424,639.36, 637,042.56 and 140,318.44 is: 210,505.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,639.36 : 637,042.56 = 140,318.44 : x
  2. Step 2: Convert to fraction form
    424,639.36/637,042.56 = 140,318.44/x
  3. Step 3: Cross multiply
    424,639.36x = 637,042.56 × 140,318.44
  4. Step 4: Simplify right side
    424,639.36x = 89,388,818,232.81
  5. Step 5: Solve for x
    x = 89,388,818,232.81/424,639.36
  6. Step 6: Final answer
    x = 210,505.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.