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Finding the Fourth Proportional to 398,978.97, 550,672.93 and 243,956.77

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Solution

The fourth proportional to 398,978.97, 550,672.93 and 243,956.77 is: 336,710.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,978.97 : 550,672.93 = 243,956.77 : x
  2. Step 2: Convert to fraction form
    398,978.97/550,672.93 = 243,956.77/x
  3. Step 3: Cross multiply
    398,978.97x = 550,672.93 × 243,956.77
  4. Step 4: Simplify right side
    398,978.97x = 134,340,387,342.66
  5. Step 5: Solve for x
    x = 134,340,387,342.66/398,978.97
  6. Step 6: Final answer
    x = 336,710.45

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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.