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Finding the Fourth Proportional to 272,352.60, 408,528.90 and 260,105.40

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Solution

The fourth proportional to 272,352.60, 408,528.90 and 260,105.40 is: 390,158.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,352.60 : 408,528.90 = 260,105.40 : x
  2. Step 2: Convert to fraction form
    272,352.60/408,528.90 = 260,105.40/x
  3. Step 3: Cross multiply
    272,352.60x = 408,528.90 × 260,105.40
  4. Step 4: Simplify right side
    272,352.60x = 106,260,572,946.06
  5. Step 5: Solve for x
    x = 106,260,572,946.06/272,352.60
  6. Step 6: Final answer
    x = 390,158.10

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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.