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Finding the Fourth Proportional to 663,089.76, 915,063.86 and 361,283.76

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Solution

The fourth proportional to 663,089.76, 915,063.86 and 361,283.76 is: 498,571.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,089.76 : 915,063.86 = 361,283.76 : x
  2. Step 2: Convert to fraction form
    663,089.76/915,063.86 = 361,283.76/x
  3. Step 3: Cross multiply
    663,089.76x = 915,063.86 × 361,283.76
  4. Step 4: Simplify right side
    663,089.76x = 330,597,711,980.91
  5. Step 5: Solve for x
    x = 330,597,711,980.91/663,089.76
  6. Step 6: Final answer
    x = 498,571.58

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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.