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Finding the Fourth Proportional to 680,717.40, 939,374.46 and 426,208.92

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Solution

The fourth proportional to 680,717.40, 939,374.46 and 426,208.92 is: 588,158.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,717.40 : 939,374.46 = 426,208.92 : x
  2. Step 2: Convert to fraction form
    680,717.40/939,374.46 = 426,208.92/x
  3. Step 3: Cross multiply
    680,717.40x = 939,374.46 × 426,208.92
  4. Step 4: Simplify right side
    680,717.40x = 400,369,774,072.18
  5. Step 5: Solve for x
    x = 400,369,774,072.18/680,717.40
  6. Step 6: Final answer
    x = 588,158.57

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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.