Home / 643,970.11-888,634.23-357,467.65

Finding the Fourth Proportional to 643,970.11, 888,634.23 and 357,467.65

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Solution

The fourth proportional to 643,970.11, 888,634.23 and 357,467.65 is: 493,280.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,970.11 : 888,634.23 = 357,467.65 : x
  2. Step 2: Convert to fraction form
    643,970.11/888,634.23 = 357,467.65/x
  3. Step 3: Cross multiply
    643,970.11x = 888,634.23 × 357,467.65
  4. Step 4: Simplify right side
    643,970.11x = 317,657,989,907.66
  5. Step 5: Solve for x
    x = 317,657,989,907.66/643,970.11
  6. Step 6: Final answer
    x = 493,280.64

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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.