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Finding the Fourth Proportional to 752, 1,038.36 and 555.80

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Solution

The fourth proportional to 752, 1,038.36 and 555.80 is: 767.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    752 : 1,038.36 = 555.80 : x
  2. Step 2: Convert to fraction form
    752/1,038.36 = 555.80/x
  3. Step 3: Cross multiply
    752x = 1,038.36 × 555.80
  4. Step 4: Simplify right side
    752x = 577,120.49
  5. Step 5: Solve for x
    x = 577,120.49/752
  6. Step 6: Final answer
    x = 767.45

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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.