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Finding the Third Proportional to 528 and 740.63

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Solution

The third proportional to 528 and 740.63 is: 1,038.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    528 : 740.63 = 740.63 : x
  2. Step 2: Convert to fraction form
    528/740.63 = 740.63/x
  3. Step 3: Cross multiply
    528x = 740.63 × 740.63
  4. Step 4: Simplify right side
    528x = 548,525.39
  5. Step 5: Solve for x
    x = 548,525.39/528
  6. Step 6: Final answer
    x = 1,038.87

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.