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Finding the Fourth Proportional to 659,340.34, 989,416.59 and 259,913.14

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Solution

The fourth proportional to 659,340.34, 989,416.59 and 259,913.14 is: 390,029.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,340.34 : 989,416.59 = 259,913.14 : x
  2. Step 2: Convert to fraction form
    659,340.34/989,416.59 = 259,913.14/x
  3. Step 3: Cross multiply
    659,340.34x = 989,416.59 × 259,913.14
  4. Step 4: Simplify right side
    659,340.34x = 257,162,372,674.99
  5. Step 5: Solve for x
    x = 257,162,372,674.99/659,340.34
  6. Step 6: Final answer
    x = 390,029.79

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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.