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Finding the Fourth Proportional to 620,221.32, 930,335.42 and 220,877.64

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Solution

The fourth proportional to 620,221.32, 930,335.42 and 220,877.64 is: 331,317.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,221.32 : 930,335.42 = 220,877.64 : x
  2. Step 2: Convert to fraction form
    620,221.32/930,335.42 = 220,877.64/x
  3. Step 3: Cross multiply
    620,221.32x = 930,335.42 × 220,877.64
  4. Step 4: Simplify right side
    620,221.32x = 205,490,291,978.01
  5. Step 5: Solve for x
    x = 205,490,291,978.01/620,221.32
  6. Step 6: Final answer
    x = 331,317.69

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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.