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Finding the Fourth Proportional to 638,071.70, 880,577.61 and 351,591.44

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Solution

The fourth proportional to 638,071.70, 880,577.61 and 351,591.44 is: 485,217.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,071.70 : 880,577.61 = 351,591.44 : x
  2. Step 2: Convert to fraction form
    638,071.70/880,577.61 = 351,591.44/x
  3. Step 3: Cross multiply
    638,071.70x = 880,577.61 × 351,591.44
  4. Step 4: Simplify right side
    638,071.70x = 309,603,549,931.66
  5. Step 5: Solve for x
    x = 309,603,549,931.66/638,071.70
  6. Step 6: Final answer
    x = 485,217.49

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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.