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Finding the Fourth Proportional to 272,290.60, 408,435.90 and 260,043.40

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Solution

The fourth proportional to 272,290.60, 408,435.90 and 260,043.40 is: 390,065.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,290.60 : 408,435.90 = 260,043.40 : x
  2. Step 2: Convert to fraction form
    272,290.60/408,435.90 = 260,043.40/x
  3. Step 3: Cross multiply
    272,290.60x = 408,435.90 × 260,043.40
  4. Step 4: Simplify right side
    272,290.60x = 106,211,060,118.06
  5. Step 5: Solve for x
    x = 106,211,060,118.06/272,290.60
  6. Step 6: Final answer
    x = 390,065.10

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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.