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Finding the Fourth Proportional to 647,933.80, 972,338.10 and 422,745.70

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Solution

The fourth proportional to 647,933.80, 972,338.10 and 422,745.70 is: 634,403.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,933.80 : 972,338.10 = 422,745.70 : x
  2. Step 2: Convert to fraction form
    647,933.80/972,338.10 = 422,745.70/x
  3. Step 3: Cross multiply
    647,933.80x = 972,338.10 × 422,745.70
  4. Step 4: Simplify right side
    647,933.80x = 411,051,750,721.17
  5. Step 5: Solve for x
    x = 411,051,750,721.17/647,933.80
  6. Step 6: Final answer
    x = 634,403.93

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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.