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Finding the Fourth Proportional to 620,145.40, 930,218.10 and 221,236.60

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Solution

The fourth proportional to 620,145.40, 930,218.10 and 221,236.60 is: 331,854.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,145.40 : 930,218.10 = 221,236.60 : x
  2. Step 2: Convert to fraction form
    620,145.40/930,218.10 = 221,236.60/x
  3. Step 3: Cross multiply
    620,145.40x = 930,218.10 × 221,236.60
  4. Step 4: Simplify right side
    620,145.40x = 205,798,289,702.46
  5. Step 5: Solve for x
    x = 205,798,289,702.46/620,145.40
  6. Step 6: Final answer
    x = 331,854.90

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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.