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Finding the Fourth Proportional to 917.46, 1,377 and 479.01

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Solution

The fourth proportional to 917.46, 1,377 and 479.01 is: 718.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    917.46 : 1,377 = 479.01 : x
  2. Step 2: Convert to fraction form
    917.46/1,377 = 479.01/x
  3. Step 3: Cross multiply
    917.46x = 1,377 × 479.01
  4. Step 4: Simplify right side
    917.46x = 659,601.93
  5. Step 5: Solve for x
    x = 659,601.93/917.46
  6. Step 6: Final answer
    x = 718.94

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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.