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Finding the Fourth Proportional to 381,600.40, 572,400.60 and 115,547.80

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Solution

The fourth proportional to 381,600.40, 572,400.60 and 115,547.80 is: 173,321.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,600.40 : 572,400.60 = 115,547.80 : x
  2. Step 2: Convert to fraction form
    381,600.40/572,400.60 = 115,547.80/x
  3. Step 3: Cross multiply
    381,600.40x = 572,400.60 × 115,547.80
  4. Step 4: Simplify right side
    381,600.40x = 66,139,630,048.68
  5. Step 5: Solve for x
    x = 66,139,630,048.68/381,600.40
  6. Step 6: Final answer
    x = 173,321.70

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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.