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Finding the Fourth Proportional to 278,088.40, 417,132.60 and 208,104.40

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Solution

The fourth proportional to 278,088.40, 417,132.60 and 208,104.40 is: 312,156.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,088.40 : 417,132.60 = 208,104.40 : x
  2. Step 2: Convert to fraction form
    278,088.40/417,132.60 = 208,104.40/x
  3. Step 3: Cross multiply
    278,088.40x = 417,132.60 × 208,104.40
  4. Step 4: Simplify right side
    278,088.40x = 86,807,129,443.44
  5. Step 5: Solve for x
    x = 86,807,129,443.44/278,088.40
  6. Step 6: Final answer
    x = 312,156.60

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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.