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Finding the Fourth Proportional to 855,679.07, 1,284,780.20 and 477,339

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Solution

The fourth proportional to 855,679.07, 1,284,780.20 and 477,339 is: 716,712.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    855,679.07 : 1,284,780.20 = 477,339 : x
  2. Step 2: Convert to fraction form
    855,679.07/1,284,780.20 = 477,339/x
  3. Step 3: Cross multiply
    855,679.07x = 1,284,780.20 × 477,339
  4. Step 4: Simplify right side
    855,679.07x = 613,275,693,501.11
  5. Step 5: Solve for x
    x = 613,275,693,501.11/855,679.07
  6. Step 6: Final answer
    x = 716,712.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.