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Finding the Fourth Proportional to 744.36, 1,026.90 and 555.36

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Solution

The fourth proportional to 744.36, 1,026.90 and 555.36 is: 766.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.36 : 1,026.90 = 555.36 : x
  2. Step 2: Convert to fraction form
    744.36/1,026.90 = 555.36/x
  3. Step 3: Cross multiply
    744.36x = 1,026.90 × 555.36
  4. Step 4: Simplify right side
    744.36x = 570,299.18
  5. Step 5: Solve for x
    x = 570,299.18/744.36
  6. Step 6: Final answer
    x = 766.16

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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.