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Finding the Fourth Proportional to 645,159.91, 889,007.71 and 499,078.33

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Solution

The fourth proportional to 645,159.91, 889,007.71 and 499,078.33 is: 687,712.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,159.91 : 889,007.71 = 499,078.33 : x
  2. Step 2: Convert to fraction form
    645,159.91/889,007.71 = 499,078.33/x
  3. Step 3: Cross multiply
    645,159.91x = 889,007.71 × 499,078.33
  4. Step 4: Simplify right side
    645,159.91x = 443,684,483,263.92
  5. Step 5: Solve for x
    x = 443,684,483,263.92/645,159.91
  6. Step 6: Final answer
    x = 687,712.42

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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.