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Finding the Fourth Proportional to 659,348.34, 989,428.59 and 259,921.14

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Solution

The fourth proportional to 659,348.34, 989,428.59 and 259,921.14 is: 390,041.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,348.34 : 989,428.59 = 259,921.14 : x
  2. Step 2: Convert to fraction form
    659,348.34/989,428.59 = 259,921.14/x
  3. Step 3: Cross multiply
    659,348.34x = 989,428.59 × 259,921.14
  4. Step 4: Simplify right side
    659,348.34x = 257,173,407,061.39
  5. Step 5: Solve for x
    x = 257,173,407,061.39/659,348.34
  6. Step 6: Final answer
    x = 390,041.79

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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.