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Finding the Fourth Proportional to 369,980.64, 553,367.50 and 217,815.10

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Solution

The fourth proportional to 369,980.64, 553,367.50 and 217,815.10 is: 325,778.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    369,980.64 : 553,367.50 = 217,815.10 : x
  2. Step 2: Convert to fraction form
    369,980.64/553,367.50 = 217,815.10/x
  3. Step 3: Cross multiply
    369,980.64x = 553,367.50 × 217,815.10
  4. Step 4: Simplify right side
    369,980.64x = 120,531,797,349.25
  5. Step 5: Solve for x
    x = 120,531,797,349.25/369,980.64
  6. Step 6: Final answer
    x = 325,778.66

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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.