Home / 643,929.82-888,715.56-385,817.02

Finding the Fourth Proportional to 643,929.82, 888,715.56 and 385,817.02

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Solution

The fourth proportional to 643,929.82, 888,715.56 and 385,817.02 is: 532,482.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,929.82 : 888,715.56 = 385,817.02 : x
  2. Step 2: Convert to fraction form
    643,929.82/888,715.56 = 385,817.02/x
  3. Step 3: Cross multiply
    643,929.82x = 888,715.56 × 385,817.02
  4. Step 4: Simplify right side
    643,929.82x = 342,881,588,986.83
  5. Step 5: Solve for x
    x = 342,881,588,986.83/643,929.82
  6. Step 6: Final answer
    x = 532,482.86

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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.