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Finding the Fourth Proportional to 398,463.70, 549,672.73 and 253,020.64

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Solution

The fourth proportional to 398,463.70, 549,672.73 and 253,020.64 is: 349,036.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,463.70 : 549,672.73 = 253,020.64 : x
  2. Step 2: Convert to fraction form
    398,463.70/549,672.73 = 253,020.64/x
  3. Step 3: Cross multiply
    398,463.70x = 549,672.73 × 253,020.64
  4. Step 4: Simplify right side
    398,463.70x = 139,078,541,921.68
  5. Step 5: Solve for x
    x = 139,078,541,921.68/398,463.70
  6. Step 6: Final answer
    x = 349,036.92

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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.