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Finding the Fourth Proportional to 988.88, 1,484.28 and 476.24

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Solution

The fourth proportional to 988.88, 1,484.28 and 476.24 is: 714.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.88 : 1,484.28 = 476.24 : x
  2. Step 2: Convert to fraction form
    988.88/1,484.28 = 476.24/x
  3. Step 3: Cross multiply
    988.88x = 1,484.28 × 476.24
  4. Step 4: Simplify right side
    988.88x = 706,873.51
  5. Step 5: Solve for x
    x = 706,873.51/988.88
  6. Step 6: Final answer
    x = 714.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.