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Finding the Fourth Proportional to 398,768.51, 549,989.39 and 255,541.88

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Solution

The fourth proportional to 398,768.51, 549,989.39 and 255,541.88 is: 352,448.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,768.51 : 549,989.39 = 255,541.88 : x
  2. Step 2: Convert to fraction form
    398,768.51/549,989.39 = 255,541.88/x
  3. Step 3: Cross multiply
    398,768.51x = 549,989.39 × 255,541.88
  4. Step 4: Simplify right side
    398,768.51x = 140,545,319,950.71
  5. Step 5: Solve for x
    x = 140,545,319,950.71/398,768.51
  6. Step 6: Final answer
    x = 352,448.40

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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.