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Finding the Fourth Proportional to 688,765.40, 950,513.82 and 378,664.20

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Solution

The fourth proportional to 688,765.40, 950,513.82 and 378,664.20 is: 522,566.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,765.40 : 950,513.82 = 378,664.20 : x
  2. Step 2: Convert to fraction form
    688,765.40/950,513.82 = 378,664.20/x
  3. Step 3: Cross multiply
    688,765.40x = 950,513.82 × 378,664.20
  4. Step 4: Simplify right side
    688,765.40x = 359,925,555,239.24
  5. Step 5: Solve for x
    x = 359,925,555,239.24/688,765.40
  6. Step 6: Final answer
    x = 522,566.25

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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.