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Finding the Fourth Proportional to 383,445.60, 575,168.40 and 102,991.20

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Solution

The fourth proportional to 383,445.60, 575,168.40 and 102,991.20 is: 154,486.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,445.60 : 575,168.40 = 102,991.20 : x
  2. Step 2: Convert to fraction form
    383,445.60/575,168.40 = 102,991.20/x
  3. Step 3: Cross multiply
    383,445.60x = 575,168.40 × 102,991.20
  4. Step 4: Simplify right side
    383,445.60x = 59,237,283,718.08
  5. Step 5: Solve for x
    x = 59,237,283,718.08/383,445.60
  6. Step 6: Final answer
    x = 154,486.80

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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.