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Finding the Fourth Proportional to 659,451.90, 988,661.10 and 260,391.38

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Solution

The fourth proportional to 659,451.90, 988,661.10 and 260,391.38 is: 390,383.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,451.90 : 988,661.10 = 260,391.38 : x
  2. Step 2: Convert to fraction form
    659,451.90/988,661.10 = 260,391.38/x
  3. Step 3: Cross multiply
    659,451.90x = 988,661.10 × 260,391.38
  4. Step 4: Simplify right side
    659,451.90x = 257,438,828,181.32
  5. Step 5: Solve for x
    x = 257,438,828,181.32/659,451.90
  6. Step 6: Final answer
    x = 390,383.03

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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.