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Finding the Fourth Proportional to 611,129.88, 843,368.22 and 339,215.28

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Solution

The fourth proportional to 611,129.88, 843,368.22 and 339,215.28 is: 468,122.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,129.88 : 843,368.22 = 339,215.28 : x
  2. Step 2: Convert to fraction form
    611,129.88/843,368.22 = 339,215.28/x
  3. Step 3: Cross multiply
    611,129.88x = 843,368.22 × 339,215.28
  4. Step 4: Simplify right side
    611,129.88x = 286,083,386,890.40
  5. Step 5: Solve for x
    x = 286,083,386,890.40/611,129.88
  6. Step 6: Final answer
    x = 468,122.07

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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.