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Finding the Fourth Proportional to 382,647.41, 528,781.68 and 286,988.03

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Solution

The fourth proportional to 382,647.41, 528,781.68 and 286,988.03 is: 396,589.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    382,647.41 : 528,781.68 = 286,988.03 : x
  2. Step 2: Convert to fraction form
    382,647.41/528,781.68 = 286,988.03/x
  3. Step 3: Cross multiply
    382,647.41x = 528,781.68 × 286,988.03
  4. Step 4: Simplify right side
    382,647.41x = 151,754,009,999.38
  5. Step 5: Solve for x
    x = 151,754,009,999.38/382,647.41
  6. Step 6: Final answer
    x = 396,589.68

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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.