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Finding the Fourth Proportional to 688,646.56, 950,328.66 and 378,556.36

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Solution

The fourth proportional to 688,646.56, 950,328.66 and 378,556.36 is: 522,405.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,646.56 : 950,328.66 = 378,556.36 : x
  2. Step 2: Convert to fraction form
    688,646.56/950,328.66 = 378,556.36/x
  3. Step 3: Cross multiply
    688,646.56x = 950,328.66 × 378,556.36
  4. Step 4: Simplify right side
    688,646.56x = 359,752,958,333.28
  5. Step 5: Solve for x
    x = 359,752,958,333.28/688,646.56
  6. Step 6: Final answer
    x = 522,405.80

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1.5x scale

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.