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Finding the Fourth Proportional to 611,118.31, 843,336.89 and 339,188.55

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Solution

The fourth proportional to 611,118.31, 843,336.89 and 339,188.55 is: 468,076.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,118.31 : 843,336.89 = 339,188.55 : x
  2. Step 2: Convert to fraction form
    611,118.31/843,336.89 = 339,188.55/x
  3. Step 3: Cross multiply
    611,118.31x = 843,336.89 × 339,188.55
  4. Step 4: Simplify right side
    611,118.31x = 286,050,216,880.61
  5. Step 5: Solve for x
    x = 286,050,216,880.61/611,118.31
  6. Step 6: Final answer
    x = 468,076.66

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1.5x scale

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.