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Finding the Fourth Proportional to 680,884.16, 939,785.64 and 394,358

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Solution

The fourth proportional to 680,884.16, 939,785.64 and 394,358 is: 544,309.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,884.16 : 939,785.64 = 394,358 : x
  2. Step 2: Convert to fraction form
    680,884.16/939,785.64 = 394,358/x
  3. Step 3: Cross multiply
    680,884.16x = 939,785.64 × 394,358
  4. Step 4: Simplify right side
    680,884.16x = 370,611,985,419.12
  5. Step 5: Solve for x
    x = 370,611,985,419.12/680,884.16
  6. Step 6: Final answer
    x = 544,309.89

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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.