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Finding the Fourth Proportional to 661,745.20, 993,028.20 and 346,428.40

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Solution

The fourth proportional to 661,745.20, 993,028.20 and 346,428.40 is: 519,857.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,745.20 : 993,028.20 = 346,428.40 : x
  2. Step 2: Convert to fraction form
    661,745.20/993,028.20 = 346,428.40/x
  3. Step 3: Cross multiply
    661,745.20x = 993,028.20 × 346,428.40
  4. Step 4: Simplify right side
    661,745.20x = 344,013,170,480.88
  5. Step 5: Solve for x
    x = 344,013,170,480.88/661,745.20
  6. Step 6: Final answer
    x = 519,857.45

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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.