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Finding the Fourth Proportional to 727.84, 1,003.76 and 479.08

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Solution

The fourth proportional to 727.84, 1,003.76 and 479.08 is: 660.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.84 : 1,003.76 = 479.08 : x
  2. Step 2: Convert to fraction form
    727.84/1,003.76 = 479.08/x
  3. Step 3: Cross multiply
    727.84x = 1,003.76 × 479.08
  4. Step 4: Simplify right side
    727.84x = 480,881.34
  5. Step 5: Solve for x
    x = 480,881.34/727.84
  6. Step 6: Final answer
    x = 660.70

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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.