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Finding the Fourth Proportional to 353,246.69, 487,309.01 and 209,905.22

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Solution

The fourth proportional to 353,246.69, 487,309.01 and 209,905.22 is: 289,567.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,246.69 : 487,309.01 = 209,905.22 : x
  2. Step 2: Convert to fraction form
    353,246.69/487,309.01 = 209,905.22/x
  3. Step 3: Cross multiply
    353,246.69x = 487,309.01 × 209,905.22
  4. Step 4: Simplify right side
    353,246.69x = 102,288,701,465.96
  5. Step 5: Solve for x
    x = 102,288,701,465.96/353,246.69
  6. Step 6: Final answer
    x = 289,567.34

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1.5x scale

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.