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Finding the Fourth Proportional to 644,201.76, 888,968.64 and 357,740.16

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Solution

The fourth proportional to 644,201.76, 888,968.64 and 357,740.16 is: 493,664.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,201.76 : 888,968.64 = 357,740.16 : x
  2. Step 2: Convert to fraction form
    644,201.76/888,968.64 = 357,740.16/x
  3. Step 3: Cross multiply
    644,201.76x = 888,968.64 × 357,740.16
  4. Step 4: Simplify right side
    644,201.76x = 318,019,783,508.58
  5. Step 5: Solve for x
    x = 318,019,783,508.58/644,201.76
  6. Step 6: Final answer
    x = 493,664.88

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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.