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Finding the Fourth Proportional to 709,866.52, 979,637.42 and 403,986.89

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Solution

The fourth proportional to 709,866.52, 979,637.42 and 403,986.89 is: 557,514.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,866.52 : 979,637.42 = 403,986.89 : x
  2. Step 2: Convert to fraction form
    709,866.52/979,637.42 = 403,986.89/x
  3. Step 3: Cross multiply
    709,866.52x = 979,637.42 × 403,986.89
  4. Step 4: Simplify right side
    709,866.52x = 395,760,678,092.49
  5. Step 5: Solve for x
    x = 395,760,678,092.49/709,866.52
  6. Step 6: Final answer
    x = 557,514.22

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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.