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Finding the Fourth Proportional to 1,315,507.52, 1,815,400.32 and 711,895.52

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Solution

The fourth proportional to 1,315,507.52, 1,815,400.32 and 711,895.52 is: 982,415.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315,507.52 : 1,815,400.32 = 711,895.52 : x
  2. Step 2: Convert to fraction form
    1,315,507.52/1,815,400.32 = 711,895.52/x
  3. Step 3: Cross multiply
    1,315,507.52x = 1,815,400.32 × 711,895.52
  4. Step 4: Simplify right side
    1,315,507.52x = 1,292,375,354,814.57
  5. Step 5: Solve for x
    x = 1,292,375,354,814.57/1,315,507.52
  6. Step 6: Final answer
    x = 982,415.79

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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.