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Finding the Fourth Proportional to 424,705.68, 637,150.68 and 129,210

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Solution

The fourth proportional to 424,705.68, 637,150.68 and 129,210 is: 193,843.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,705.68 : 637,150.68 = 129,210 : x
  2. Step 2: Convert to fraction form
    424,705.68/637,150.68 = 129,210/x
  3. Step 3: Cross multiply
    424,705.68x = 637,150.68 × 129,210
  4. Step 4: Simplify right side
    424,705.68x = 82,326,239,362.80
  5. Step 5: Solve for x
    x = 82,326,239,362.80/424,705.68
  6. Step 6: Final answer
    x = 193,843.04

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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.