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Finding the Fourth Proportional to 749.45, 1,118.51 and 730.01

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Solution

The fourth proportional to 749.45, 1,118.51 and 730.01 is: 1,089.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.45 : 1,118.51 = 730.01 : x
  2. Step 2: Convert to fraction form
    749.45/1,118.51 = 730.01/x
  3. Step 3: Cross multiply
    749.45x = 1,118.51 × 730.01
  4. Step 4: Simplify right side
    749.45x = 816,514.24
  5. Step 5: Solve for x
    x = 816,514.24/749.45
  6. Step 6: Final answer
    x = 1,089.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.