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Finding the Fourth Proportional to 978,877.88, 1,468,005.78 and 665,349.56

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Solution

The fourth proportional to 978,877.88, 1,468,005.78 and 665,349.56 is: 997,812.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,877.88 : 1,468,005.78 = 665,349.56 : x
  2. Step 2: Convert to fraction form
    978,877.88/1,468,005.78 = 665,349.56/x
  3. Step 3: Cross multiply
    978,877.88x = 1,468,005.78 × 665,349.56
  4. Step 4: Simplify right side
    978,877.88x = 976,736,999,800.46
  5. Step 5: Solve for x
    x = 976,736,999,800.46/978,877.88
  6. Step 6: Final answer
    x = 997,812.92

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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.