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Finding the Fourth Proportional to 709,808.49, 979,537.19 and 387,518.67

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Solution

The fourth proportional to 709,808.49, 979,537.19 and 387,518.67 is: 534,776.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,808.49 : 979,537.19 = 387,518.67 : x
  2. Step 2: Convert to fraction form
    709,808.49/979,537.19 = 387,518.67/x
  3. Step 3: Cross multiply
    709,808.49x = 979,537.19 × 387,518.67
  4. Step 4: Simplify right side
    709,808.49x = 379,588,947,146.74
  5. Step 5: Solve for x
    x = 379,588,947,146.74/709,808.49
  6. Step 6: Final answer
    x = 534,776.57

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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.