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Finding the Fourth Proportional to 642,509.71, 886,639.88 and 370,589.06

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Solution

The fourth proportional to 642,509.71, 886,639.88 and 370,589.06 is: 511,399.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,509.71 : 886,639.88 = 370,589.06 : x
  2. Step 2: Convert to fraction form
    642,509.71/886,639.88 = 370,589.06/x
  3. Step 3: Cross multiply
    642,509.71x = 886,639.88 × 370,589.06
  4. Step 4: Simplify right side
    642,509.71x = 328,579,039,687.71
  5. Step 5: Solve for x
    x = 328,579,039,687.71/642,509.71
  6. Step 6: Final answer
    x = 511,399.34

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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.