Home / 878,879.90-1,318,319.85-405,425.18

Finding the Fourth Proportional to 878,879.90, 1,318,319.85 and 405,425.18

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Solution

The fourth proportional to 878,879.90, 1,318,319.85 and 405,425.18 is: 608,137.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,879.90 : 1,318,319.85 = 405,425.18 : x
  2. Step 2: Convert to fraction form
    878,879.90/1,318,319.85 = 405,425.18/x
  3. Step 3: Cross multiply
    878,879.90x = 1,318,319.85 × 405,425.18
  4. Step 4: Simplify right side
    878,879.90x = 534,480,062,483.82
  5. Step 5: Solve for x
    x = 534,480,062,483.82/878,879.90
  6. Step 6: Final answer
    x = 608,137.77

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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.