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Finding the Fourth Proportional to 268,943.40, 403,415.10 and 185,999.40

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Solution

The fourth proportional to 268,943.40, 403,415.10 and 185,999.40 is: 278,999.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,943.40 : 403,415.10 = 185,999.40 : x
  2. Step 2: Convert to fraction form
    268,943.40/403,415.10 = 185,999.40/x
  3. Step 3: Cross multiply
    268,943.40x = 403,415.10 × 185,999.40
  4. Step 4: Simplify right side
    268,943.40x = 75,034,966,550.94
  5. Step 5: Solve for x
    x = 75,034,966,550.94/268,943.40
  6. Step 6: Final answer
    x = 278,999.10

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1.5x scale

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.