Home / 642,864.80-964,418.16-258,642.56

Finding the Fourth Proportional to 642,864.80, 964,418.16 and 258,642.56

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Solution

The fourth proportional to 642,864.80, 964,418.16 and 258,642.56 is: 388,012.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,864.80 : 964,418.16 = 258,642.56 : x
  2. Step 2: Convert to fraction form
    642,864.80/964,418.16 = 258,642.56/x
  3. Step 3: Cross multiply
    642,864.80x = 964,418.16 × 258,642.56
  4. Step 4: Simplify right side
    642,864.80x = 249,439,581,812.89
  5. Step 5: Solve for x
    x = 249,439,581,812.89/642,864.80
  6. Step 6: Final answer
    x = 388,012.51

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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.