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Finding the Fourth Proportional to 398,278.53, 549,628.49 and 216,990.41

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Solution

The fourth proportional to 398,278.53, 549,628.49 and 216,990.41 is: 299,449.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,278.53 : 549,628.49 = 216,990.41 : x
  2. Step 2: Convert to fraction form
    398,278.53/549,628.49 = 216,990.41/x
  3. Step 3: Cross multiply
    398,278.53x = 549,628.49 × 216,990.41
  4. Step 4: Simplify right side
    398,278.53x = 119,264,109,187.11
  5. Step 5: Solve for x
    x = 119,264,109,187.11/398,278.53
  6. Step 6: Final answer
    x = 299,449.00

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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.