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Finding the Fourth Proportional to 398,582.28, 549,732.51 and 255,355.65

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Solution

The fourth proportional to 398,582.28, 549,732.51 and 255,355.65 is: 352,191.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,582.28 : 549,732.51 = 255,355.65 : x
  2. Step 2: Convert to fraction form
    398,582.28/549,732.51 = 255,355.65/x
  3. Step 3: Cross multiply
    398,582.28x = 549,732.51 × 255,355.65
  4. Step 4: Simplify right side
    398,582.28x = 140,377,302,417.18
  5. Step 5: Solve for x
    x = 140,377,302,417.18/398,582.28
  6. Step 6: Final answer
    x = 352,191.53

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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.