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Finding the Fourth Proportional to 850.50, 1,173.06 and 555.66

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Solution

The fourth proportional to 850.50, 1,173.06 and 555.66 is: 766.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.50 : 1,173.06 = 555.66 : x
  2. Step 2: Convert to fraction form
    850.50/1,173.06 = 555.66/x
  3. Step 3: Cross multiply
    850.50x = 1,173.06 × 555.66
  4. Step 4: Simplify right side
    850.50x = 651,822.52
  5. Step 5: Solve for x
    x = 651,822.52/850.50
  6. Step 6: Final answer
    x = 766.40

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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.