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Finding the Fourth Proportional to 646,352.71, 892,003.53 and 388,308.58

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Solution

The fourth proportional to 646,352.71, 892,003.53 and 388,308.58 is: 535,887.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,352.71 : 892,003.53 = 388,308.58 : x
  2. Step 2: Convert to fraction form
    646,352.71/892,003.53 = 388,308.58/x
  3. Step 3: Cross multiply
    646,352.71x = 892,003.53 × 388,308.58
  4. Step 4: Simplify right side
    646,352.71x = 346,372,624,089.29
  5. Step 5: Solve for x
    x = 346,372,624,089.29/646,352.71
  6. Step 6: Final answer
    x = 535,887.94

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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.