Home / 638,133.69-880,613.17-347,747.78

Finding the Fourth Proportional to 638,133.69, 880,613.17 and 347,747.78

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Solution

The fourth proportional to 638,133.69, 880,613.17 and 347,747.78 is: 479,885.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,133.69 : 880,613.17 = 347,747.78 : x
  2. Step 2: Convert to fraction form
    638,133.69/880,613.17 = 347,747.78/x
  3. Step 3: Cross multiply
    638,133.69x = 880,613.17 × 347,747.78
  4. Step 4: Simplify right side
    638,133.69x = 306,231,276,238.43
  5. Step 5: Solve for x
    x = 306,231,276,238.43/638,133.69
  6. Step 6: Final answer
    x = 479,885.77

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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.