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Finding the Fourth Proportional to 426,528.36, 639,790.71 and 173,752.47

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Solution

The fourth proportional to 426,528.36, 639,790.71 and 173,752.47 is: 260,627.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,528.36 : 639,790.71 = 173,752.47 : x
  2. Step 2: Convert to fraction form
    426,528.36/639,790.71 = 173,752.47/x
  3. Step 3: Cross multiply
    426,528.36x = 639,790.71 × 173,752.47
  4. Step 4: Simplify right side
    426,528.36x = 111,165,216,145.55
  5. Step 5: Solve for x
    x = 111,165,216,145.55/426,528.36
  6. Step 6: Final answer
    x = 260,627.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.