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Finding the Fourth Proportional to 941.77, 1,299 and 646.53

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Solution

The fourth proportional to 941.77, 1,299 and 646.53 is: 891.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    941.77 : 1,299 = 646.53 : x
  2. Step 2: Convert to fraction form
    941.77/1,299 = 646.53/x
  3. Step 3: Cross multiply
    941.77x = 1,299 × 646.53
  4. Step 4: Simplify right side
    941.77x = 839,842.47
  5. Step 5: Solve for x
    x = 839,842.47/941.77
  6. Step 6: Final answer
    x = 891.77

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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.