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Finding the Fourth Proportional to 274,243.40, 411,365.10 and 218,947.40

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Solution

The fourth proportional to 274,243.40, 411,365.10 and 218,947.40 is: 328,421.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,243.40 : 411,365.10 = 218,947.40 : x
  2. Step 2: Convert to fraction form
    274,243.40/411,365.10 = 218,947.40/x
  3. Step 3: Cross multiply
    274,243.40x = 411,365.10 × 218,947.40
  4. Step 4: Simplify right side
    274,243.40x = 90,067,319,095.74
  5. Step 5: Solve for x
    x = 90,067,319,095.74/274,243.40
  6. Step 6: Final answer
    x = 328,421.10

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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.