Home / 515,587.06-772,465.56-215,407

Finding the Fourth Proportional to 515,587.06, 772,465.56 and 215,407

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Solution

The fourth proportional to 515,587.06, 772,465.56 and 215,407 is: 322,728.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,587.06 : 772,465.56 = 215,407 : x
  2. Step 2: Convert to fraction form
    515,587.06/772,465.56 = 215,407/x
  3. Step 3: Cross multiply
    515,587.06x = 772,465.56 × 215,407
  4. Step 4: Simplify right side
    515,587.06x = 166,394,488,882.92
  5. Step 5: Solve for x
    x = 166,394,488,882.92/515,587.06
  6. Step 6: Final answer
    x = 322,728.21

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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.