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Finding the Fourth Proportional to 744.09, 1,026.90 and 412.55

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Solution

The fourth proportional to 744.09, 1,026.90 and 412.55 is: 569.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.09 : 1,026.90 = 412.55 : x
  2. Step 2: Convert to fraction form
    744.09/1,026.90 = 412.55/x
  3. Step 3: Cross multiply
    744.09x = 1,026.90 × 412.55
  4. Step 4: Simplify right side
    744.09x = 423,642.46
  5. Step 5: Solve for x
    x = 423,642.46/744.09
  6. Step 6: Final answer
    x = 569.34

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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.