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Finding the Fourth Proportional to 661,161.16, 912,408.42 and 359,355.88

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Solution

The fourth proportional to 661,161.16, 912,408.42 and 359,355.88 is: 495,914.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,161.16 : 912,408.42 = 359,355.88 : x
  2. Step 2: Convert to fraction form
    661,161.16/912,408.42 = 359,355.88/x
  3. Step 3: Cross multiply
    661,161.16x = 912,408.42 × 359,355.88
  4. Step 4: Simplify right side
    661,161.16x = 327,879,330,688.51
  5. Step 5: Solve for x
    x = 327,879,330,688.51/661,161.16
  6. Step 6: Final answer
    x = 495,914.39

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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.