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Finding the Fourth Proportional to 634,368.70, 875,469.27 and 419,131.18

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Solution

The fourth proportional to 634,368.70, 875,469.27 and 419,131.18 is: 578,427.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    634,368.70 : 875,469.27 = 419,131.18 : x
  2. Step 2: Convert to fraction form
    634,368.70/875,469.27 = 419,131.18/x
  3. Step 3: Cross multiply
    634,368.70x = 875,469.27 × 419,131.18
  4. Step 4: Simplify right side
    634,368.70x = 366,936,468,188.84
  5. Step 5: Solve for x
    x = 366,936,468,188.84/634,368.70
  6. Step 6: Final answer
    x = 578,427.76

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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.