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Finding the Fourth Proportional to 659,013.12, 987,391.35 and 359,703.81

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Solution

The fourth proportional to 659,013.12, 987,391.35 and 359,703.81 is: 538,939.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,013.12 : 987,391.35 = 359,703.81 : x
  2. Step 2: Convert to fraction form
    659,013.12/987,391.35 = 359,703.81/x
  3. Step 3: Cross multiply
    659,013.12x = 987,391.35 × 359,703.81
  4. Step 4: Simplify right side
    659,013.12x = 355,168,430,556.04
  5. Step 5: Solve for x
    x = 355,168,430,556.04/659,013.12
  6. Step 6: Final answer
    x = 538,939.85

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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.