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Finding the Fourth Proportional to 740.00, 1,020.58 and 445.21

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Solution

The fourth proportional to 740.00, 1,020.58 and 445.21 is: 614.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    740.00 : 1,020.58 = 445.21 : x
  2. Step 2: Convert to fraction form
    740.00/1,020.58 = 445.21/x
  3. Step 3: Cross multiply
    740.00x = 1,020.58 × 445.21
  4. Step 4: Simplify right side
    740.00x = 454,368.76
  5. Step 5: Solve for x
    x = 454,368.76/740.00
  6. Step 6: Final answer
    x = 614.01

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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.