Home / 378,015.60-521,663.04-208,250.40

Finding the Fourth Proportional to 378,015.60, 521,663.04 and 208,250.40

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Solution

The fourth proportional to 378,015.60, 521,663.04 and 208,250.40 is: 287,386.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,015.60 : 521,663.04 = 208,250.40 : x
  2. Step 2: Convert to fraction form
    378,015.60/521,663.04 = 208,250.40/x
  3. Step 3: Cross multiply
    378,015.60x = 521,663.04 × 208,250.40
  4. Step 4: Simplify right side
    378,015.60x = 108,636,536,745.22
  5. Step 5: Solve for x
    x = 108,636,536,745.22/378,015.60
  6. Step 6: Final answer
    x = 287,386.38

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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.