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Finding the Fourth Proportional to 378,132.60, 529,779.30 and 378,132.60

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Solution

The fourth proportional to 378,132.60, 529,779.30 and 378,132.60 is: 529,779.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,132.60 : 529,779.30 = 378,132.60 : x
  2. Step 2: Convert to fraction form
    378,132.60/529,779.30 = 378,132.60/x
  3. Step 3: Cross multiply
    378,132.60x = 529,779.30 × 378,132.60
  4. Step 4: Simplify right side
    378,132.60x = 200,326,824,135.18
  5. Step 5: Solve for x
    x = 200,326,824,135.18/378,132.60
  6. Step 6: Final answer
    x = 529,779.30

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.