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Finding the Fourth Proportional to 1,319,899.38, 1,979,783.40 and 722,028.30

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Solution

The fourth proportional to 1,319,899.38, 1,979,783.40 and 722,028.30 is: 1,083,006.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,899.38 : 1,979,783.40 = 722,028.30 : x
  2. Step 2: Convert to fraction form
    1,319,899.38/1,979,783.40 = 722,028.30/x
  3. Step 3: Cross multiply
    1,319,899.38x = 1,979,783.40 × 722,028.30
  4. Step 4: Simplify right side
    1,319,899.38x = 1,429,459,642,670.22
  5. Step 5: Solve for x
    x = 1,429,459,642,670.22/1,319,899.38
  6. Step 6: Final answer
    x = 1,083,006.53

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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.