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Finding the Fourth Proportional to 646,358.48, 892,011.48 and 388,314.36

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Solution

The fourth proportional to 646,358.48, 892,011.48 and 388,314.36 is: 535,895.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,358.48 : 892,011.48 = 388,314.36 : x
  2. Step 2: Convert to fraction form
    646,358.48/892,011.48 = 388,314.36/x
  3. Step 3: Cross multiply
    646,358.48x = 892,011.48 × 388,314.36
  4. Step 4: Simplify right side
    646,358.48x = 346,380,866,968.85
  5. Step 5: Solve for x
    x = 346,380,866,968.85/646,358.48
  6. Step 6: Final answer
    x = 535,895.91

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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.