Home / 1,212,830.40-1,820,120.40-679,785.60

Finding the Fourth Proportional to 1,212,830.40, 1,820,120.40 and 679,785.60

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Solution

The fourth proportional to 1,212,830.40, 1,820,120.40 and 679,785.60 is: 1,020,168.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212,830.40 : 1,820,120.40 = 679,785.60 : x
  2. Step 2: Convert to fraction form
    1,212,830.40/1,820,120.40 = 679,785.60/x
  3. Step 3: Cross multiply
    1,212,830.40x = 1,820,120.40 × 679,785.60
  4. Step 4: Simplify right side
    1,212,830.40x = 1,237,291,638,186.24
  5. Step 5: Solve for x
    x = 1,237,291,638,186.24/1,212,830.40
  6. Step 6: Final answer
    x = 1,020,168.72

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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.