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Finding the Fourth Proportional to 740.84, 1,021.95 and 461.12

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Solution

The fourth proportional to 740.84, 1,021.95 and 461.12 is: 636.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    740.84 : 1,021.95 = 461.12 : x
  2. Step 2: Convert to fraction form
    740.84/1,021.95 = 461.12/x
  3. Step 3: Cross multiply
    740.84x = 1,021.95 × 461.12
  4. Step 4: Simplify right side
    740.84x = 471,236.47
  5. Step 5: Solve for x
    x = 471,236.47/740.84
  6. Step 6: Final answer
    x = 636.09

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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.