Home / 643,578.30-888,145.02-357,103.17

Finding the Fourth Proportional to 643,578.30, 888,145.02 and 357,103.17

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Solution

The fourth proportional to 643,578.30, 888,145.02 and 357,103.17 is: 492,806.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,578.30 : 888,145.02 = 357,103.17 : x
  2. Step 2: Convert to fraction form
    643,578.30/888,145.02 = 357,103.17/x
  3. Step 3: Cross multiply
    643,578.30x = 888,145.02 × 357,103.17
  4. Step 4: Simplify right side
    643,578.30x = 317,159,402,061.71
  5. Step 5: Solve for x
    x = 317,159,402,061.71/643,578.30
  6. Step 6: Final answer
    x = 492,806.24

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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.