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Finding the Fourth Proportional to 383,281.50, 528,645.12 and 281,272.50

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Solution

The fourth proportional to 383,281.50, 528,645.12 and 281,272.50 is: 387,948.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,281.50 : 528,645.12 = 281,272.50 : x
  2. Step 2: Convert to fraction form
    383,281.50/528,645.12 = 281,272.50/x
  3. Step 3: Cross multiply
    383,281.50x = 528,645.12 × 281,272.50
  4. Step 4: Simplify right side
    383,281.50x = 148,693,334,515.20
  5. Step 5: Solve for x
    x = 148,693,334,515.20/383,281.50
  6. Step 6: Final answer
    x = 387,948.11

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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.