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Finding the Fourth Proportional to 400,777.68, 553,074.02 and 217,018.25

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Solution

The fourth proportional to 400,777.68, 553,074.02 and 217,018.25 is: 299,485.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,777.68 : 553,074.02 = 217,018.25 : x
  2. Step 2: Convert to fraction form
    400,777.68/553,074.02 = 217,018.25/x
  3. Step 3: Cross multiply
    400,777.68x = 553,074.02 × 217,018.25
  4. Step 4: Simplify right side
    400,777.68x = 120,027,155,940.87
  5. Step 5: Solve for x
    x = 120,027,155,940.87/400,777.68
  6. Step 6: Final answer
    x = 299,485.63

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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.