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Finding the Fourth Proportional to 643,715.58, 888,347.70 and 371,778.42

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Solution

The fourth proportional to 643,715.58, 888,347.70 and 371,778.42 is: 513,065.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,715.58 : 888,347.70 = 371,778.42 : x
  2. Step 2: Convert to fraction form
    643,715.58/888,347.70 = 371,778.42/x
  3. Step 3: Cross multiply
    643,715.58x = 888,347.70 × 371,778.42
  4. Step 4: Simplify right side
    643,715.58x = 330,268,504,316.63
  5. Step 5: Solve for x
    x = 330,268,504,316.63/643,715.58
  6. Step 6: Final answer
    x = 513,065.89

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1.5x scale

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.