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Finding the Fourth Proportional to 276,678.80, 415,066.80 and 99,288.80

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Solution

The fourth proportional to 276,678.80, 415,066.80 and 99,288.80 is: 148,950.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,678.80 : 415,066.80 = 99,288.80 : x
  2. Step 2: Convert to fraction form
    276,678.80/415,066.80 = 99,288.80/x
  3. Step 3: Cross multiply
    276,678.80x = 415,066.80 × 99,288.80
  4. Step 4: Simplify right side
    276,678.80x = 41,211,484,491.84
  5. Step 5: Solve for x
    x = 41,211,484,491.84/276,678.80
  6. Step 6: Final answer
    x = 148,950.64

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1.5x scale

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.