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Finding the Fourth Proportional to 431,373.40, 646,574.10 and 206,841.40

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Solution

The fourth proportional to 431,373.40, 646,574.10 and 206,841.40 is: 310,029.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,373.40 : 646,574.10 = 206,841.40 : x
  2. Step 2: Convert to fraction form
    431,373.40/646,574.10 = 206,841.40/x
  3. Step 3: Cross multiply
    431,373.40x = 646,574.10 × 206,841.40
  4. Step 4: Simplify right side
    431,373.40x = 133,738,292,047.74
  5. Step 5: Solve for x
    x = 133,738,292,047.74/431,373.40
  6. Step 6: Final answer
    x = 310,029.07

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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.