Home / 1,319,331.10-1,978,996.65-420,838.60

Finding the Fourth Proportional to 1,319,331.10, 1,978,996.65 and 420,838.60

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Solution

The fourth proportional to 1,319,331.10, 1,978,996.65 and 420,838.60 is: 631,257.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,331.10 : 1,978,996.65 = 420,838.60 : x
  2. Step 2: Convert to fraction form
    1,319,331.10/1,978,996.65 = 420,838.60/x
  3. Step 3: Cross multiply
    1,319,331.10x = 1,978,996.65 × 420,838.60
  4. Step 4: Simplify right side
    1,319,331.10x = 832,838,179,590.69
  5. Step 5: Solve for x
    x = 832,838,179,590.69/1,319,331.10
  6. Step 6: Final answer
    x = 631,257.90

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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.