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Finding the Fourth Proportional to 738.89, 1,019.55 and 440.04

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Solution

The fourth proportional to 738.89, 1,019.55 and 440.04 is: 607.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.89 : 1,019.55 = 440.04 : x
  2. Step 2: Convert to fraction form
    738.89/1,019.55 = 440.04/x
  3. Step 3: Cross multiply
    738.89x = 1,019.55 × 440.04
  4. Step 4: Simplify right side
    738.89x = 448,648.26
  5. Step 5: Solve for x
    x = 448,648.26/738.89
  6. Step 6: Final answer
    x = 607.19

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Double scale
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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.