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Finding the Fourth Proportional to 439,978.15, 607,178.48 and 287,114.14

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Solution

The fourth proportional to 439,978.15, 607,178.48 and 287,114.14 is: 396,223.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,978.15 : 607,178.48 = 287,114.14 : x
  2. Step 2: Convert to fraction form
    439,978.15/607,178.48 = 287,114.14/x
  3. Step 3: Cross multiply
    439,978.15x = 607,178.48 × 287,114.14
  4. Step 4: Simplify right side
    439,978.15x = 174,329,525,676.14
  5. Step 5: Solve for x
    x = 174,329,525,676.14/439,978.15
  6. Step 6: Final answer
    x = 396,223.14

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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.