Home / 643,356.30-887,938.17-356,968.65

Finding the Fourth Proportional to 643,356.30, 887,938.17 and 356,968.65

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Solution

The fourth proportional to 643,356.30, 887,938.17 and 356,968.65 is: 492,675.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,356.30 : 887,938.17 = 356,968.65 : x
  2. Step 2: Convert to fraction form
    643,356.30/887,938.17 = 356,968.65/x
  3. Step 3: Cross multiply
    643,356.30x = 887,938.17 × 356,968.65
  4. Step 4: Simplify right side
    643,356.30x = 316,966,089,828.37
  5. Step 5: Solve for x
    x = 316,966,089,828.37/643,356.30
  6. Step 6: Final answer
    x = 492,675.82

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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.