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Finding the Fourth Proportional to 659,013.60, 988,326.62 and 279,931.32

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Solution

The fourth proportional to 659,013.60, 988,326.62 and 279,931.32 is: 419,814.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,013.60 : 988,326.62 = 279,931.32 : x
  2. Step 2: Convert to fraction form
    659,013.60/988,326.62 = 279,931.32/x
  3. Step 3: Cross multiply
    659,013.60x = 988,326.62 × 279,931.32
  4. Step 4: Simplify right side
    659,013.60x = 276,663,573,928.08
  5. Step 5: Solve for x
    x = 276,663,573,928.08/659,013.60
  6. Step 6: Final answer
    x = 419,814.67

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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.