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Finding the Fourth Proportional to 384,888.51, 531,162.36 and 215,122.50

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Solution

The fourth proportional to 384,888.51, 531,162.36 and 215,122.50 is: 296,878.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,888.51 : 531,162.36 = 215,122.50 : x
  2. Step 2: Convert to fraction form
    384,888.51/531,162.36 = 215,122.50/x
  3. Step 3: Cross multiply
    384,888.51x = 531,162.36 × 215,122.50
  4. Step 4: Simplify right side
    384,888.51x = 114,264,974,789.10
  5. Step 5: Solve for x
    x = 114,264,974,789.10/384,888.51
  6. Step 6: Final answer
    x = 296,878.11

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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.