Home / 521,985,109.12-720,385,354.56-287,077,160.32

Finding the Fourth Proportional to 521,985,109.12, 720,385,354.56 and 287,077,160.32

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Solution

The fourth proportional to 521,985,109.12, 720,385,354.56 and 287,077,160.32 is: 396,191,727.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,985,109.12 : 720,385,354.56 = 287,077,160.32 : x
  2. Step 2: Convert to fraction form
    521,985,109.12/720,385,354.56 = 287,077,160.32/x
  3. Step 3: Cross multiply
    521,985,109.12x = 720,385,354.56 × 287,077,160.32
  4. Step 4: Simplify right side
    521,985,109.12x = 206,806,181,923,201,152
  5. Step 5: Solve for x
    x = 206,806,181,923,201,152/521,985,109.12
  6. Step 6: Final answer
    x = 396,191,727.14

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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.