Home / 1,319,984.80-1,980,011.34-421,425.76

Finding the Fourth Proportional to 1,319,984.80, 1,980,011.34 and 421,425.76

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Solution

The fourth proportional to 1,319,984.80, 1,980,011.34 and 421,425.76 is: 632,149.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,984.80 : 1,980,011.34 = 421,425.76 : x
  2. Step 2: Convert to fraction form
    1,319,984.80/1,980,011.34 = 421,425.76/x
  3. Step 3: Cross multiply
    1,319,984.80x = 1,980,011.34 × 421,425.76
  4. Step 4: Simplify right side
    1,319,984.80x = 834,427,783,768.12
  5. Step 5: Solve for x
    x = 834,427,783,768.12/1,319,984.80
  6. Step 6: Final answer
    x = 632,149.54

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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.