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Finding the Fourth Proportional to 611,420.88, 843,719.68 and 339,474.72

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Solution

The fourth proportional to 611,420.88, 843,719.68 and 339,474.72 is: 468,452.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,420.88 : 843,719.68 = 339,474.72 : x
  2. Step 2: Convert to fraction form
    611,420.88/843,719.68 = 339,474.72/x
  3. Step 3: Cross multiply
    611,420.88x = 843,719.68 × 339,474.72
  4. Step 4: Simplify right side
    611,420.88x = 286,421,502,126.49
  5. Step 5: Solve for x
    x = 286,421,502,126.49/611,420.88
  6. Step 6: Final answer
    x = 468,452.27

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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.