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Finding the Fourth Proportional to 621,009.20, 930,201.60 and 621,009.20

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Solution

The fourth proportional to 621,009.20, 930,201.60 and 621,009.20 is: 930,201.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,009.20 : 930,201.60 = 621,009.20 : x
  2. Step 2: Convert to fraction form
    621,009.20/930,201.60 = 621,009.20/x
  3. Step 3: Cross multiply
    621,009.20x = 930,201.60 × 621,009.20
  4. Step 4: Simplify right side
    621,009.20x = 577,663,751,454.72
  5. Step 5: Solve for x
    x = 577,663,751,454.72/621,009.20
  6. Step 6: Final answer
    x = 930,201.60

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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.