Home / 638,109.55-880,597.09-351,639.89

Finding the Fourth Proportional to 638,109.55, 880,597.09 and 351,639.89

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Solution

The fourth proportional to 638,109.55, 880,597.09 and 351,639.89 is: 485,266.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,109.55 : 880,597.09 = 351,639.89 : x
  2. Step 2: Convert to fraction form
    638,109.55/880,597.09 = 351,639.89/x
  3. Step 3: Cross multiply
    638,109.55x = 880,597.09 × 351,639.89
  4. Step 4: Simplify right side
    638,109.55x = 309,653,063,861.92
  5. Step 5: Solve for x
    x = 309,653,063,861.92/638,109.55
  6. Step 6: Final answer
    x = 485,266.31

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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.