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Finding the Fourth Proportional to 917.07, 1,375.60 and 404.07

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Solution

The fourth proportional to 917.07, 1,375.60 and 404.07 is: 606.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    917.07 : 1,375.60 = 404.07 : x
  2. Step 2: Convert to fraction form
    917.07/1,375.60 = 404.07/x
  3. Step 3: Cross multiply
    917.07x = 1,375.60 × 404.07
  4. Step 4: Simplify right side
    917.07x = 555,831.81
  5. Step 5: Solve for x
    x = 555,831.81/917.07
  6. Step 6: Final answer
    x = 606.10

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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.