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Finding the Fourth Proportional to 946.46, 1,417.64 and 458.49

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Solution

The fourth proportional to 946.46, 1,417.64 and 458.49 is: 686.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    946.46 : 1,417.64 = 458.49 : x
  2. Step 2: Convert to fraction form
    946.46/1,417.64 = 458.49/x
  3. Step 3: Cross multiply
    946.46x = 1,417.64 × 458.49
  4. Step 4: Simplify right side
    946.46x = 649,966.16
  5. Step 5: Solve for x
    x = 649,966.16/946.46
  6. Step 6: Final answer
    x = 686.73

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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.