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Finding the Fourth Proportional to 276,716.40, 415,074.60 and 260,386.80

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Solution

The fourth proportional to 276,716.40, 415,074.60 and 260,386.80 is: 390,580.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,716.40 : 415,074.60 = 260,386.80 : x
  2. Step 2: Convert to fraction form
    276,716.40/415,074.60 = 260,386.80/x
  3. Step 3: Cross multiply
    276,716.40x = 415,074.60 × 260,386.80
  4. Step 4: Simplify right side
    276,716.40x = 108,079,946,855.28
  5. Step 5: Solve for x
    x = 108,079,946,855.28/276,716.40
  6. Step 6: Final answer
    x = 390,580.20

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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.