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Finding the Fourth Proportional to 660,911.32, 912,063.18 and 359,105.32

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Solution

The fourth proportional to 660,911.32, 912,063.18 and 359,105.32 is: 495,568.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,911.32 : 912,063.18 = 359,105.32 : x
  2. Step 2: Convert to fraction form
    660,911.32/912,063.18 = 359,105.32/x
  3. Step 3: Cross multiply
    660,911.32x = 912,063.18 × 359,105.32
  4. Step 4: Simplify right side
    660,911.32x = 327,526,740,114.12
  5. Step 5: Solve for x
    x = 327,526,740,114.12/660,911.32
  6. Step 6: Final answer
    x = 495,568.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.