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Finding the Fourth Proportional to 643,817.54, 888,461.78 and 357,330.26

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Solution

The fourth proportional to 643,817.54, 888,461.78 and 357,330.26 is: 493,112.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,817.54 : 888,461.78 = 357,330.26 : x
  2. Step 2: Convert to fraction form
    643,817.54/888,461.78 = 357,330.26/x
  3. Step 3: Cross multiply
    643,817.54x = 888,461.78 × 357,330.26
  4. Step 4: Simplify right side
    643,817.54x = 317,474,278,847.46
  5. Step 5: Solve for x
    x = 317,474,278,847.46/643,817.54
  6. Step 6: Final answer
    x = 493,112.19

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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.