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Finding the Fourth Proportional to 505,407.69, 753,513.55 and 448,609.95

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Solution

The fourth proportional to 505,407.69, 753,513.55 and 448,609.95 is: 668,833.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,407.69 : 753,513.55 = 448,609.95 : x
  2. Step 2: Convert to fraction form
    505,407.69/753,513.55 = 448,609.95/x
  3. Step 3: Cross multiply
    505,407.69x = 753,513.55 × 448,609.95
  4. Step 4: Simplify right side
    505,407.69x = 338,033,674,868.30
  5. Step 5: Solve for x
    x = 338,033,674,868.30/505,407.69
  6. Step 6: Final answer
    x = 668,833.66

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.