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Finding the Fourth Proportional to 627,745.20, 941,617.80 and 312,817.20

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Solution

The fourth proportional to 627,745.20, 941,617.80 and 312,817.20 is: 469,225.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,745.20 : 941,617.80 = 312,817.20 : x
  2. Step 2: Convert to fraction form
    627,745.20/941,617.80 = 312,817.20/x
  3. Step 3: Cross multiply
    627,745.20x = 941,617.80 × 312,817.20
  4. Step 4: Simplify right side
    627,745.20x = 294,554,243,666.16
  5. Step 5: Solve for x
    x = 294,554,243,666.16/627,745.20
  6. Step 6: Final answer
    x = 469,225.80

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Similar ratio
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1.5x scale

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.