Home / 879,678.60-1,317,962.70-780,145.80

Finding the Fourth Proportional to 879,678.60, 1,317,962.70 and 780,145.80

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Solution

The fourth proportional to 879,678.60, 1,317,962.70 and 780,145.80 is: 1,168,839.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,678.60 : 1,317,962.70 = 780,145.80 : x
  2. Step 2: Convert to fraction form
    879,678.60/1,317,962.70 = 780,145.80/x
  3. Step 3: Cross multiply
    879,678.60x = 1,317,962.70 × 780,145.80
  4. Step 4: Simplify right side
    879,678.60x = 1,028,203,064,961.66
  5. Step 5: Solve for x
    x = 1,028,203,064,961.66/879,678.60
  6. Step 6: Final answer
    x = 1,168,839.47

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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.