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Finding the Fourth Proportional to 740.44, 1,020.40 and 530.25

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Solution

The fourth proportional to 740.44, 1,020.40 and 530.25 is: 730.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    740.44 : 1,020.40 = 530.25 : x
  2. Step 2: Convert to fraction form
    740.44/1,020.40 = 530.25/x
  3. Step 3: Cross multiply
    740.44x = 1,020.40 × 530.25
  4. Step 4: Simplify right side
    740.44x = 541,067.10
  5. Step 5: Solve for x
    x = 541,067.10/740.44
  6. Step 6: Final answer
    x = 730.74

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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.