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Finding the Fourth Proportional to 642,732.18, 886,955.31 and 370,800.66

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Solution

The fourth proportional to 642,732.18, 886,955.31 and 370,800.66 is: 511,696.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,732.18 : 886,955.31 = 370,800.66 : x
  2. Step 2: Convert to fraction form
    642,732.18/886,955.31 = 370,800.66/x
  3. Step 3: Cross multiply
    642,732.18x = 886,955.31 × 370,800.66
  4. Step 4: Simplify right side
    642,732.18x = 328,883,614,338.51
  5. Step 5: Solve for x
    x = 328,883,614,338.51/642,732.18
  6. Step 6: Final answer
    x = 511,696.20

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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.