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Finding the Fourth Proportional to 659,342.68, 989,191.56 and 339,320.20

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Solution

The fourth proportional to 659,342.68, 989,191.56 and 339,320.20 is: 509,071.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,342.68 : 989,191.56 = 339,320.20 : x
  2. Step 2: Convert to fraction form
    659,342.68/989,191.56 = 339,320.20/x
  3. Step 3: Cross multiply
    659,342.68x = 989,191.56 × 339,320.20
  4. Step 4: Simplify right side
    659,342.68x = 335,652,677,977.51
  5. Step 5: Solve for x
    x = 335,652,677,977.51/659,342.68
  6. Step 6: Final answer
    x = 509,071.67

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Double scale
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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.