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Finding the Fourth Proportional to 478,855.80, 718,283.70 and 212,333.40

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Solution

The fourth proportional to 478,855.80, 718,283.70 and 212,333.40 is: 318,500.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,855.80 : 718,283.70 = 212,333.40 : x
  2. Step 2: Convert to fraction form
    478,855.80/718,283.70 = 212,333.40/x
  3. Step 3: Cross multiply
    478,855.80x = 718,283.70 × 212,333.40
  4. Step 4: Simplify right side
    478,855.80x = 152,515,620,185.58
  5. Step 5: Solve for x
    x = 152,515,620,185.58/478,855.80
  6. Step 6: Final answer
    x = 318,500.10

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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.