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Finding the Fourth Proportional to 762.98, 1,053.30 and 479.48

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Solution

The fourth proportional to 762.98, 1,053.30 and 479.48 is: 661.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.98 : 1,053.30 = 479.48 : x
  2. Step 2: Convert to fraction form
    762.98/1,053.30 = 479.48/x
  3. Step 3: Cross multiply
    762.98x = 1,053.30 × 479.48
  4. Step 4: Simplify right side
    762.98x = 505,031.02
  5. Step 5: Solve for x
    x = 505,031.02/762.98
  6. Step 6: Final answer
    x = 661.92

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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.