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Finding the Fourth Proportional to 313,817.80, 470,435.10 and 219,047.80

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Solution

The fourth proportional to 313,817.80, 470,435.10 and 219,047.80 is: 328,368.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,817.80 : 470,435.10 = 219,047.80 : x
  2. Step 2: Convert to fraction form
    313,817.80/470,435.10 = 219,047.80/x
  3. Step 3: Cross multiply
    313,817.80x = 470,435.10 × 219,047.80
  4. Step 4: Simplify right side
    313,817.80x = 103,047,773,697.78
  5. Step 5: Solve for x
    x = 103,047,773,697.78/313,817.80
  6. Step 6: Final answer
    x = 328,368.16

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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.