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Finding the Fourth Proportional to 490,763.60, 735,886.20 and 209,963.60

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Solution

The fourth proportional to 490,763.60, 735,886.20 and 209,963.60 is: 314,834.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,763.60 : 735,886.20 = 209,963.60 : x
  2. Step 2: Convert to fraction form
    490,763.60/735,886.20 = 209,963.60/x
  3. Step 3: Cross multiply
    490,763.60x = 735,886.20 × 209,963.60
  4. Step 4: Simplify right side
    490,763.60x = 154,509,315,742.32
  5. Step 5: Solve for x
    x = 154,509,315,742.32/490,763.60
  6. Step 6: Final answer
    x = 314,834.51

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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.