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Finding the Fourth Proportional to 946.77, 1,419.10 and 714.90

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Solution

The fourth proportional to 946.77, 1,419.10 and 714.90 is: 1,071.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    946.77 : 1,419.10 = 714.90 : x
  2. Step 2: Convert to fraction form
    946.77/1,419.10 = 714.90/x
  3. Step 3: Cross multiply
    946.77x = 1,419.10 × 714.90
  4. Step 4: Simplify right side
    946.77x = 1,014,516.35
  5. Step 5: Solve for x
    x = 1,014,516.35/946.77
  6. Step 6: Final answer
    x = 1,071.56

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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.