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Finding the Fourth Proportional to 664,365.70, 996,985.95 and 380,055.70

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Solution

The fourth proportional to 664,365.70, 996,985.95 and 380,055.70 is: 570,333.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,365.70 : 996,985.95 = 380,055.70 : x
  2. Step 2: Convert to fraction form
    664,365.70/996,985.95 = 380,055.70/x
  3. Step 3: Cross multiply
    664,365.70x = 996,985.95 × 380,055.70
  4. Step 4: Simplify right side
    664,365.70x = 378,910,193,117.42
  5. Step 5: Solve for x
    x = 378,910,193,117.42/664,365.70
  6. Step 6: Final answer
    x = 570,333.77

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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.