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Finding the Fourth Proportional to 278,445.60, 417,668.40 and 189,872.10

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Solution

The fourth proportional to 278,445.60, 417,668.40 and 189,872.10 is: 284,808.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,445.60 : 417,668.40 = 189,872.10 : x
  2. Step 2: Convert to fraction form
    278,445.60/417,668.40 = 189,872.10/x
  3. Step 3: Cross multiply
    278,445.60x = 417,668.40 × 189,872.10
  4. Step 4: Simplify right side
    278,445.60x = 79,303,576,211.64
  5. Step 5: Solve for x
    x = 79,303,576,211.64/278,445.60
  6. Step 6: Final answer
    x = 284,808.15

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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.