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Finding the Fourth Proportional to 665,358.86, 918,194.32 and 378,878.94

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Solution

The fourth proportional to 665,358.86, 918,194.32 and 378,878.94 is: 522,852.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,358.86 : 918,194.32 = 378,878.94 : x
  2. Step 2: Convert to fraction form
    665,358.86/918,194.32 = 378,878.94/x
  3. Step 3: Cross multiply
    665,358.86x = 918,194.32 × 378,878.94
  4. Step 4: Simplify right side
    665,358.86x = 347,884,490,675.62
  5. Step 5: Solve for x
    x = 347,884,490,675.62/665,358.86
  6. Step 6: Final answer
    x = 522,852.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.