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Finding the Fourth Proportional to 876,672.80, 1,314,620.40 and 403,503.20

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Solution

The fourth proportional to 876,672.80, 1,314,620.40 and 403,503.20 is: 605,075.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,672.80 : 1,314,620.40 = 403,503.20 : x
  2. Step 2: Convert to fraction form
    876,672.80/1,314,620.40 = 403,503.20/x
  3. Step 3: Cross multiply
    876,672.80x = 1,314,620.40 × 403,503.20
  4. Step 4: Simplify right side
    876,672.80x = 530,453,538,185.28
  5. Step 5: Solve for x
    x = 530,453,538,185.28/876,672.80
  6. Step 6: Final answer
    x = 605,075.85

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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.