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Finding the Fourth Proportional to 398,769, 549,990.08 and 255,542.37

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Solution

The fourth proportional to 398,769, 549,990.08 and 255,542.37 is: 352,449.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,769 : 549,990.08 = 255,542.37 : x
  2. Step 2: Convert to fraction form
    398,769/549,990.08 = 255,542.37/x
  3. Step 3: Cross multiply
    398,769x = 549,990.08 × 255,542.37
  4. Step 4: Simplify right side
    398,769x = 140,545,768,519.69
  5. Step 5: Solve for x
    x = 140,545,768,519.69/398,769
  6. Step 6: Final answer
    x = 352,449.08

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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.