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Finding the Fourth Proportional to 790,530, 1,185,798 and 191,490

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Solution

The fourth proportional to 790,530, 1,185,798 and 191,490 is: 287,235.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    790,530 : 1,185,798 = 191,490 : x
  2. Step 2: Convert to fraction form
    790,530/1,185,798 = 191,490/x
  3. Step 3: Cross multiply
    790,530x = 1,185,798 × 191,490
  4. Step 4: Simplify right side
    790,530x = 227,068,459,020
  5. Step 5: Solve for x
    x = 227,068,459,020/790,530
  6. Step 6: Final answer
    x = 287,235.73

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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.