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Finding the Fourth Proportional to 876,661.80, 1,314,603.90 and 403,492.20

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Solution

The fourth proportional to 876,661.80, 1,314,603.90 and 403,492.20 is: 605,059.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,661.80 : 1,314,603.90 = 403,492.20 : x
  2. Step 2: Convert to fraction form
    876,661.80/1,314,603.90 = 403,492.20/x
  3. Step 3: Cross multiply
    876,661.80x = 1,314,603.90 × 403,492.20
  4. Step 4: Simplify right side
    876,661.80x = 530,432,419,739.58
  5. Step 5: Solve for x
    x = 530,432,419,739.58/876,661.80
  6. Step 6: Final answer
    x = 605,059.35

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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.