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Finding the Fourth Proportional to 1,318,359.60, 1,977,539.40 and 786,918.60

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Solution

The fourth proportional to 1,318,359.60, 1,977,539.40 and 786,918.60 is: 1,180,377.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,359.60 : 1,977,539.40 = 786,918.60 : x
  2. Step 2: Convert to fraction form
    1,318,359.60/1,977,539.40 = 786,918.60/x
  3. Step 3: Cross multiply
    1,318,359.60x = 1,977,539.40 × 786,918.60
  4. Step 4: Simplify right side
    1,318,359.60x = 1,556,162,536,092.84
  5. Step 5: Solve for x
    x = 1,556,162,536,092.84/1,318,359.60
  6. Step 6: Final answer
    x = 1,180,377.90

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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.