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Finding the Fourth Proportional to 709,408.44, 979,004.43 and 387,139.32

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Solution

The fourth proportional to 709,408.44, 979,004.43 and 387,139.32 is: 534,263.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,408.44 : 979,004.43 = 387,139.32 : x
  2. Step 2: Convert to fraction form
    709,408.44/979,004.43 = 387,139.32/x
  3. Step 3: Cross multiply
    709,408.44x = 979,004.43 × 387,139.32
  4. Step 4: Simplify right side
    709,408.44x = 379,011,109,307.19
  5. Step 5: Solve for x
    x = 379,011,109,307.19/709,408.44
  6. Step 6: Final answer
    x = 534,263.60

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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.