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Finding the Fourth Proportional to 611,421.88, 843,721.06 and 339,475.72

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Solution

The fourth proportional to 611,421.88, 843,721.06 and 339,475.72 is: 468,453.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,421.88 : 843,721.06 = 339,475.72 : x
  2. Step 2: Convert to fraction form
    611,421.88/843,721.06 = 339,475.72/x
  3. Step 3: Cross multiply
    611,421.88x = 843,721.06 × 339,475.72
  4. Step 4: Simplify right side
    611,421.88x = 286,422,814,322.66
  5. Step 5: Solve for x
    x = 286,422,814,322.66/611,421.88
  6. Step 6: Final answer
    x = 468,453.65

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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.