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Finding the Fourth Proportional to 945.70, 1,417.74 and 458.08

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Solution

The fourth proportional to 945.70, 1,417.74 and 458.08 is: 686.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.70 : 1,417.74 = 458.08 : x
  2. Step 2: Convert to fraction form
    945.70/1,417.74 = 458.08/x
  3. Step 3: Cross multiply
    945.70x = 1,417.74 × 458.08
  4. Step 4: Simplify right side
    945.70x = 649,438.34
  5. Step 5: Solve for x
    x = 649,438.34/945.70
  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.