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Finding the Fourth Proportional to 646,162.49, 891,696.90 and 355,768.12

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Solution

The fourth proportional to 646,162.49, 891,696.90 and 355,768.12 is: 490,955.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,162.49 : 891,696.90 = 355,768.12 : x
  2. Step 2: Convert to fraction form
    646,162.49/891,696.90 = 355,768.12/x
  3. Step 3: Cross multiply
    646,162.49x = 891,696.90 × 355,768.12
  4. Step 4: Simplify right side
    646,162.49x = 317,237,330,612.25
  5. Step 5: Solve for x
    x = 317,237,330,612.25/646,162.49
  6. Step 6: Final answer
    x = 490,955.97

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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.