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Finding the Fourth Proportional to 661,015.11, 912,479.92 and 446,445.81

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Solution

The fourth proportional to 661,015.11, 912,479.92 and 446,445.81 is: 616,283.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,015.11 : 912,479.92 = 446,445.81 : x
  2. Step 2: Convert to fraction form
    661,015.11/912,479.92 = 446,445.81/x
  3. Step 3: Cross multiply
    661,015.11x = 912,479.92 × 446,445.81
  4. Step 4: Simplify right side
    661,015.11x = 407,372,835,877.02
  5. Step 5: Solve for x
    x = 407,372,835,877.02/661,015.11
  6. Step 6: Final answer
    x = 616,283.69

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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.