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Finding the Fourth Proportional to 709,907.09, 979,711.47 and 387,647.10

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Solution

The fourth proportional to 709,907.09, 979,711.47 and 387,647.10 is: 534,974.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,907.09 : 979,711.47 = 387,647.10 : x
  2. Step 2: Convert to fraction form
    709,907.09/979,711.47 = 387,647.10/x
  3. Step 3: Cross multiply
    709,907.09x = 979,711.47 × 387,647.10
  4. Step 4: Simplify right side
    709,907.09x = 379,782,310,182.24
  5. Step 5: Solve for x
    x = 379,782,310,182.24/709,907.09
  6. Step 6: Final answer
    x = 534,974.67

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