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Finding the Fourth Proportional to 398,663.64, 549,844.38 and 255,437.64

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Solution

The fourth proportional to 398,663.64, 549,844.38 and 255,437.64 is: 352,304.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,663.64 : 549,844.38 = 255,437.64 : x
  2. Step 2: Convert to fraction form
    398,663.64/549,844.38 = 255,437.64/x
  3. Step 3: Cross multiply
    398,663.64x = 549,844.38 × 255,437.64
  4. Step 4: Simplify right side
    398,663.64x = 140,450,950,794.46
  5. Step 5: Solve for x
    x = 140,450,950,794.46/398,663.64
  6. Step 6: Final answer
    x = 352,304.39

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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.