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Finding the Fourth Proportional to 648,009.70, 972,014.55 and 198,799.90

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Solution

The fourth proportional to 648,009.70, 972,014.55 and 198,799.90 is: 298,199.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,009.70 : 972,014.55 = 198,799.90 : x
  2. Step 2: Convert to fraction form
    648,009.70/972,014.55 = 198,799.90/x
  3. Step 3: Cross multiply
    648,009.70x = 972,014.55 × 198,799.90
  4. Step 4: Simplify right side
    648,009.70x = 193,236,395,338.55
  5. Step 5: Solve for x
    x = 193,236,395,338.55/648,009.70
  6. Step 6: Final answer
    x = 298,199.85

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Double scale
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Similar ratio
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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.