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Finding the Fourth Proportional to 727.47, 1,003.84 and 412.76

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Solution

The fourth proportional to 727.47, 1,003.84 and 412.76 is: 569.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.47 : 1,003.84 = 412.76 : x
  2. Step 2: Convert to fraction form
    727.47/1,003.84 = 412.76/x
  3. Step 3: Cross multiply
    727.47x = 1,003.84 × 412.76
  4. Step 4: Simplify right side
    727.47x = 414,345.00
  5. Step 5: Solve for x
    x = 414,345.00/727.47
  6. Step 6: Final answer
    x = 569.57

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Find fourth proportional to 363.74, 501.92 and 206.38
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Double scale
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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.