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Finding the Fourth Proportional to 740.04, 1,021.40 and 445.33

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Solution

The fourth proportional to 740.04, 1,021.40 and 445.33 is: 614.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    740.04 : 1,021.40 = 445.33 : x
  2. Step 2: Convert to fraction form
    740.04/1,021.40 = 445.33/x
  3. Step 3: Cross multiply
    740.04x = 1,021.40 × 445.33
  4. Step 4: Simplify right side
    740.04x = 454,860.06
  5. Step 5: Solve for x
    x = 454,860.06/740.04
  6. Step 6: Final answer
    x = 614.64

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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.