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Finding the Fourth Proportional to 285,551.48, 428,328.21 and 72,319.34

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Solution

The fourth proportional to 285,551.48, 428,328.21 and 72,319.34 is: 108,479.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,551.48 : 428,328.21 = 72,319.34 : x
  2. Step 2: Convert to fraction form
    285,551.48/428,328.21 = 72,319.34/x
  3. Step 3: Cross multiply
    285,551.48x = 428,328.21 × 72,319.34
  4. Step 4: Simplify right side
    285,551.48x = 30,976,413,450.58
  5. Step 5: Solve for x
    x = 30,976,413,450.58/285,551.48
  6. Step 6: Final answer
    x = 108,479.26

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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.