Home / 378,176.14-521,894.01-208,421.20

Finding the Fourth Proportional to 378,176.14, 521,894.01 and 208,421.20

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Solution

The fourth proportional to 378,176.14, 521,894.01 and 208,421.20 is: 287,627.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,176.14 : 521,894.01 = 208,421.20 : x
  2. Step 2: Convert to fraction form
    378,176.14/521,894.01 = 208,421.20/x
  3. Step 3: Cross multiply
    378,176.14x = 521,894.01 × 208,421.20
  4. Step 4: Simplify right side
    378,176.14x = 108,773,775,837.01
  5. Step 5: Solve for x
    x = 108,773,775,837.01/378,176.14
  6. Step 6: Final answer
    x = 287,627.28

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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.