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Finding the Fourth Proportional to 608,540.40, 912,810.60 and 209,145.60

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Solution

The fourth proportional to 608,540.40, 912,810.60 and 209,145.60 is: 313,718.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,540.40 : 912,810.60 = 209,145.60 : x
  2. Step 2: Convert to fraction form
    608,540.40/912,810.60 = 209,145.60/x
  3. Step 3: Cross multiply
    608,540.40x = 912,810.60 × 209,145.60
  4. Step 4: Simplify right side
    608,540.40x = 190,910,320,623.36
  5. Step 5: Solve for x
    x = 190,910,320,623.36/608,540.40
  6. Step 6: Final answer
    x = 313,718.40

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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.