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Finding the Fourth Proportional to 978,870.88, 1,467,995.28 and 665,342.56

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Solution

The fourth proportional to 978,870.88, 1,467,995.28 and 665,342.56 is: 997,802.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,870.88 : 1,467,995.28 = 665,342.56 : x
  2. Step 2: Convert to fraction form
    978,870.88/1,467,995.28 = 665,342.56/x
  3. Step 3: Cross multiply
    978,870.88x = 1,467,995.28 × 665,342.56
  4. Step 4: Simplify right side
    978,870.88x = 976,719,737,663.12
  5. Step 5: Solve for x
    x = 976,719,737,663.12/978,870.88
  6. Step 6: Final answer
    x = 997,802.42

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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.