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Finding the Fourth Proportional to 1,056.88, 1,584.51 and 646.21

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Solution

The fourth proportional to 1,056.88, 1,584.51 and 646.21 is: 968.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,056.88 : 1,584.51 = 646.21 : x
  2. Step 2: Convert to fraction form
    1,056.88/1,584.51 = 646.21/x
  3. Step 3: Cross multiply
    1,056.88x = 1,584.51 × 646.21
  4. Step 4: Simplify right side
    1,056.88x = 1,023,926.21
  5. Step 5: Solve for x
    x = 1,023,926.21/1,056.88
  6. Step 6: Final answer
    x = 968.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.