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Finding the Fourth Proportional to 398,185.40, 549,456 and 245,199.08

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Solution

The fourth proportional to 398,185.40, 549,456 and 245,199.08 is: 338,350.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,185.40 : 549,456 = 245,199.08 : x
  2. Step 2: Convert to fraction form
    398,185.40/549,456 = 245,199.08/x
  3. Step 3: Cross multiply
    398,185.40x = 549,456 × 245,199.08
  4. Step 4: Simplify right side
    398,185.40x = 134,726,105,700.48
  5. Step 5: Solve for x
    x = 134,726,105,700.48/398,185.40
  6. Step 6: Final answer
    x = 338,350.19

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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.