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Finding the Fourth Proportional to 702,590.88, 1,059,397.32 and 643,804.32

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Solution

The fourth proportional to 702,590.88, 1,059,397.32 and 643,804.32 is: 970,756.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    702,590.88 : 1,059,397.32 = 643,804.32 : x
  2. Step 2: Convert to fraction form
    702,590.88/1,059,397.32 = 643,804.32/x
  3. Step 3: Cross multiply
    702,590.88x = 1,059,397.32 × 643,804.32
  4. Step 4: Simplify right side
    702,590.88x = 682,044,571,212.42
  5. Step 5: Solve for x
    x = 682,044,571,212.42/702,590.88
  6. Step 6: Final answer
    x = 970,756.37

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.