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Finding the Fourth Proportional to 643,515.41, 888,051.37 and 357,034.81

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Solution

The fourth proportional to 643,515.41, 888,051.37 and 357,034.81 is: 492,708.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,515.41 : 888,051.37 = 357,034.81 : x
  2. Step 2: Convert to fraction form
    643,515.41/888,051.37 = 357,034.81/x
  3. Step 3: Cross multiply
    643,515.41x = 888,051.37 × 357,034.81
  4. Step 4: Simplify right side
    643,515.41x = 317,065,252,049.45
  5. Step 5: Solve for x
    x = 317,065,252,049.45/643,515.41
  6. Step 6: Final answer
    x = 492,708.10

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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.