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Finding the Fourth Proportional to 390,272.39, 585,475.32 and 134,092.67

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Solution

The fourth proportional to 390,272.39, 585,475.32 and 134,092.67 is: 201,161.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,272.39 : 585,475.32 = 134,092.67 : x
  2. Step 2: Convert to fraction form
    390,272.39/585,475.32 = 134,092.67/x
  3. Step 3: Cross multiply
    390,272.39x = 585,475.32 × 134,092.67
  4. Step 4: Simplify right side
    390,272.39x = 78,507,945,950.53
  5. Step 5: Solve for x
    x = 78,507,945,950.53/390,272.39
  6. Step 6: Final answer
    x = 201,161.93

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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.