Home / 2,118,983.78-3,178,405.40-920,907.51

Finding the Fourth Proportional to 2,118,983.78, 3,178,405.40 and 920,907.51

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Solution

The fourth proportional to 2,118,983.78, 3,178,405.40 and 920,907.51 is: 1,381,330.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,118,983.78 : 3,178,405.40 = 920,907.51 : x
  2. Step 2: Convert to fraction form
    2,118,983.78/3,178,405.40 = 920,907.51/x
  3. Step 3: Cross multiply
    2,118,983.78x = 3,178,405.40 × 920,907.51
  4. Step 4: Simplify right side
    2,118,983.78x = 2,927,017,398,080.02
  5. Step 5: Solve for x
    x = 2,927,017,398,080.02/2,118,983.78
  6. Step 6: Final answer
    x = 1,381,330.73

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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.