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Finding the Fourth Proportional to 850.78, 1,173 and 555.58

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Solution

The fourth proportional to 850.78, 1,173 and 555.58 is: 766.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.78 : 1,173 = 555.58 : x
  2. Step 2: Convert to fraction form
    850.78/1,173 = 555.58/x
  3. Step 3: Cross multiply
    850.78x = 1,173 × 555.58
  4. Step 4: Simplify right side
    850.78x = 651,695.34
  5. Step 5: Solve for x
    x = 651,695.34/850.78
  6. Step 6: Final answer
    x = 766.00

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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.