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Finding the Fourth Proportional to 461,289.70, 636,625.47 and 279,987.40

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Solution

The fourth proportional to 461,289.70, 636,625.47 and 279,987.40 is: 386,410.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    461,289.70 : 636,625.47 = 279,987.40 : x
  2. Step 2: Convert to fraction form
    461,289.70/636,625.47 = 279,987.40/x
  3. Step 3: Cross multiply
    461,289.70x = 636,625.47 × 279,987.40
  4. Step 4: Simplify right side
    461,289.70x = 178,247,110,119.08
  5. Step 5: Solve for x
    x = 178,247,110,119.08/461,289.70
  6. Step 6: Final answer
    x = 386,410.34

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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.