Home / 1,319,983.80-1,980,009.84-421,424.76

Finding the Fourth Proportional to 1,319,983.80, 1,980,009.84 and 421,424.76

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Solution

The fourth proportional to 1,319,983.80, 1,980,009.84 and 421,424.76 is: 632,148.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,983.80 : 1,980,009.84 = 421,424.76 : x
  2. Step 2: Convert to fraction form
    1,319,983.80/1,980,009.84 = 421,424.76/x
  3. Step 3: Cross multiply
    1,319,983.80x = 1,980,009.84 × 421,424.76
  4. Step 4: Simplify right side
    1,319,983.80x = 834,425,171,619.64
  5. Step 5: Solve for x
    x = 834,425,171,619.64/1,319,983.80
  6. Step 6: Final answer
    x = 632,148.04

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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.