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Finding the Fourth Proportional to 709,166.02, 978,651.44 and 386,882.90

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Solution

The fourth proportional to 709,166.02, 978,651.44 and 386,882.90 is: 533,899.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,166.02 : 978,651.44 = 386,882.90 : x
  2. Step 2: Convert to fraction form
    709,166.02/978,651.44 = 386,882.90/x
  3. Step 3: Cross multiply
    709,166.02x = 978,651.44 × 386,882.90
  4. Step 4: Simplify right side
    709,166.02x = 378,623,507,196.38
  5. Step 5: Solve for x
    x = 378,623,507,196.38/709,166.02
  6. Step 6: Final answer
    x = 533,899.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.