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Finding the Fourth Proportional to 740.19, 1,021.82 and 574.02

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Solution

The fourth proportional to 740.19, 1,021.82 and 574.02 is: 792.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    740.19 : 1,021.82 = 574.02 : x
  2. Step 2: Convert to fraction form
    740.19/1,021.82 = 574.02/x
  3. Step 3: Cross multiply
    740.19x = 1,021.82 × 574.02
  4. Step 4: Simplify right side
    740.19x = 586,545.12
  5. Step 5: Solve for x
    x = 586,545.12/740.19
  6. Step 6: Final answer
    x = 792.43

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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.