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Finding the Fourth Proportional to 271,807.40, 407,711.10 and 260,289.20

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Solution

The fourth proportional to 271,807.40, 407,711.10 and 260,289.20 is: 390,433.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    271,807.40 : 407,711.10 = 260,289.20 : x
  2. Step 2: Convert to fraction form
    271,807.40/407,711.10 = 260,289.20/x
  3. Step 3: Cross multiply
    271,807.40x = 407,711.10 × 260,289.20
  4. Step 4: Simplify right side
    271,807.40x = 106,122,796,050.12
  5. Step 5: Solve for x
    x = 106,122,796,050.12/271,807.40
  6. Step 6: Final answer
    x = 390,433.80

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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.