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Finding the Fourth Proportional to 730.54, 1,089.65 and 621.10

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Solution

The fourth proportional to 730.54, 1,089.65 and 621.10 is: 926.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    730.54 : 1,089.65 = 621.10 : x
  2. Step 2: Convert to fraction form
    730.54/1,089.65 = 621.10/x
  3. Step 3: Cross multiply
    730.54x = 1,089.65 × 621.10
  4. Step 4: Simplify right side
    730.54x = 676,781.62
  5. Step 5: Solve for x
    x = 676,781.62/730.54
  6. Step 6: Final answer
    x = 926.41

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Double scale
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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.