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Finding the Fourth Proportional to 1,245,779.60, 1,867,978.20 and 496,979.60

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Solution

The fourth proportional to 1,245,779.60, 1,867,978.20 and 496,979.60 is: 745,193.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245,779.60 : 1,867,978.20 = 496,979.60 : x
  2. Step 2: Convert to fraction form
    1,245,779.60/1,867,978.20 = 496,979.60/x
  3. Step 3: Cross multiply
    1,245,779.60x = 1,867,978.20 × 496,979.60
  4. Step 4: Simplify right side
    1,245,779.60x = 928,347,058,644.72
  5. Step 5: Solve for x
    x = 928,347,058,644.72/1,245,779.60
  6. Step 6: Final answer
    x = 745,193.66

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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.