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Finding the Fourth Proportional to 883.02, 1,218.12 and 646.56

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Solution

The fourth proportional to 883.02, 1,218.12 and 646.56 is: 891.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.02 : 1,218.12 = 646.56 : x
  2. Step 2: Convert to fraction form
    883.02/1,218.12 = 646.56/x
  3. Step 3: Cross multiply
    883.02x = 1,218.12 × 646.56
  4. Step 4: Simplify right side
    883.02x = 787,587.67
  5. Step 5: Solve for x
    x = 787,587.67/883.02
  6. Step 6: Final answer
    x = 891.93

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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.