Home / 382,718.47-528,083.40-221,565.73

Finding the Fourth Proportional to 382,718.47, 528,083.40 and 221,565.73

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Solution

The fourth proportional to 382,718.47, 528,083.40 and 221,565.73 is: 305,721.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    382,718.47 : 528,083.40 = 221,565.73 : x
  2. Step 2: Convert to fraction form
    382,718.47/528,083.40 = 221,565.73/x
  3. Step 3: Cross multiply
    382,718.47x = 528,083.40 × 221,565.73
  4. Step 4: Simplify right side
    382,718.47x = 117,005,184,021.88
  5. Step 5: Solve for x
    x = 117,005,184,021.88/382,718.47
  6. Step 6: Final answer
    x = 305,721.29

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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.