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Finding the Fourth Proportional to 644,054.15, 888,760.02 and 357,555.78

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Solution

The fourth proportional to 644,054.15, 888,760.02 and 357,555.78 is: 493,407.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,054.15 : 888,760.02 = 357,555.78 : x
  2. Step 2: Convert to fraction form
    644,054.15/888,760.02 = 357,555.78/x
  3. Step 3: Cross multiply
    644,054.15x = 888,760.02 × 357,555.78
  4. Step 4: Simplify right side
    644,054.15x = 317,781,283,524.75
  5. Step 5: Solve for x
    x = 317,781,283,524.75/644,054.15
  6. Step 6: Final answer
    x = 493,407.71

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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.