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Finding the Fourth Proportional to 661,065.72, 911,959.56 and 479,379.12

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Solution

The fourth proportional to 661,065.72, 911,959.56 and 479,379.12 is: 661,317.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,065.72 : 911,959.56 = 479,379.12 : x
  2. Step 2: Convert to fraction form
    661,065.72/911,959.56 = 479,379.12/x
  3. Step 3: Cross multiply
    661,065.72x = 911,959.56 × 479,379.12
  4. Step 4: Simplify right side
    661,065.72x = 437,174,371,348.39
  5. Step 5: Solve for x
    x = 437,174,371,348.39/661,065.72
  6. Step 6: Final answer
    x = 661,317.56

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1.5x scale

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.