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Finding the Fourth Proportional to 391,774.84, 586,750.74 and 380,999.80

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Solution

The fourth proportional to 391,774.84, 586,750.74 and 380,999.80 is: 570,613.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,774.84 : 586,750.74 = 380,999.80 : x
  2. Step 2: Convert to fraction form
    391,774.84/586,750.74 = 380,999.80/x
  3. Step 3: Cross multiply
    391,774.84x = 586,750.74 × 380,999.80
  4. Step 4: Simplify right side
    391,774.84x = 223,551,914,589.85
  5. Step 5: Solve for x
    x = 223,551,914,589.85/391,774.84
  6. Step 6: Final answer
    x = 570,613.25

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1.5x scale

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.