Home / 427,790.55-642,316.64-238,620.52

Finding the Fourth Proportional to 427,790.55, 642,316.64 and 238,620.52

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Solution

The fourth proportional to 427,790.55, 642,316.64 and 238,620.52 is: 358,282.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,790.55 : 642,316.64 = 238,620.52 : x
  2. Step 2: Convert to fraction form
    427,790.55/642,316.64 = 238,620.52/x
  3. Step 3: Cross multiply
    427,790.55x = 642,316.64 × 238,620.52
  4. Step 4: Simplify right side
    427,790.55x = 153,269,930,641.45
  5. Step 5: Solve for x
    x = 153,269,930,641.45/427,790.55
  6. Step 6: Final answer
    x = 358,282.65

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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.