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Finding the Fourth Proportional to 361,980.20, 499,605.36 and 209,043.28

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Solution

The fourth proportional to 361,980.20, 499,605.36 and 209,043.28 is: 288,521.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    361,980.20 : 499,605.36 = 209,043.28 : x
  2. Step 2: Convert to fraction form
    361,980.20/499,605.36 = 209,043.28/x
  3. Step 3: Cross multiply
    361,980.20x = 499,605.36 × 209,043.28
  4. Step 4: Simplify right side
    361,980.20x = 104,439,143,159.98
  5. Step 5: Solve for x
    x = 104,439,143,159.98/361,980.20
  6. Step 6: Final answer
    x = 288,521.70

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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.