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Finding the Fourth Proportional to 638,164.83, 880,667.61 and 347,776.47

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Solution

The fourth proportional to 638,164.83, 880,667.61 and 347,776.47 is: 479,931.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,164.83 : 880,667.61 = 347,776.47 : x
  2. Step 2: Convert to fraction form
    638,164.83/880,667.61 = 347,776.47/x
  3. Step 3: Cross multiply
    638,164.83x = 880,667.61 × 347,776.47
  4. Step 4: Simplify right side
    638,164.83x = 306,275,475,951.64
  5. Step 5: Solve for x
    x = 306,275,475,951.64/638,164.83
  6. Step 6: Final answer
    x = 479,931.61

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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.